Arylpiperazinyl-cyclohexyl indole derivatives for the treatment of depression

ABSTRACT

Compounds are provided which are useful for the treatment of serotonin-affected neurological disorders which comprise                    
     Wherein: 
     R 1 , R 2  and R 3  are each, independently, hydrogen, halogen, CF 3 , alkyl, alkoxy, MeSO 2 , or together can form a 5-7 membered carbocyclic or heterocyclic ring; 
     R 4  is hydrogen, halogen, or alkyl; 
     R 5  is hydrogen, alkyl, alkylaryl, or aryl; 
     R 6  is hydrogen, halogen, CF 3 , CN, carbamide, or alkoxy; 
     X 1 , X 2  and X 3  are each carbon or one of X 1 , X 2  or X 3  may be nitrogen; 
     Y is carbon or nitrogen; and 
     Z is carbon or nitrogen; or 
     pharmaceutically acceptable salts thereof.

CROSS REFERENCE TO RELATED APPLICATIONS

This is a divisional of application Ser. No. 09/476,254 filed on Dec.30, 1999 now U.S. Pat. No. 6,313,126 the entire disclosure of which ishereby incorporated by reference and which claims the benefit of U.S.Provisional Application No. 60/155,199 filed on Jan. 7, 1999.

FIELD OF INVENTION

This invention relates to compounds useful for the treatment of diseasesaffected by disorders of the serotonin-affected neurological systems,such as depression and anxiety. More specifically the present inventionis directed to arylpiperazinyl cyclohexyl derivatives useful for thetreatment of such disorders.

BACKGROUND OF INVENTION

Pharmaceuticals which enhance neurotransmission of serotonin (5-HT) areuseful for the treatment of many psychiatric disorders, includingdepression and anxiety. The first generation of non-selectiveserotonin-affecting drugs operated through a variety of physiologicalmeans which caused them to possess numerous undesired side-effects. Themore recently prescribed drugs, the selective serotonin reuptakeinhibitors (SSRIs), act predominately by inhibiting 5-HT, which isreleased at the synapses, from being actively removed from the synapticcleft via a presynaptic serotonin transport carrier. Since SSRIs requireseveral weeks before they exert their full therapeutic effect, this 5-HTblockade mechanism cannot fully account for their therapeutic activity.It is speculated that this two week induction which occurs before a fullantidepressant effect is observed, is due to the involvement of the5-HT1A autoreceptors which suppress the firing activity of 5-HT neurons,causing a dampening of the therapeutic effect. Studies suggest thatafter several weeks of SSRI administration, a desensitization of the5-HT autoreceptors occurs allowing a full antidepressant effect in mostpatients. (See, e.g., Le Poul et al., Arch. Pharmacol., 352:141 (1995)).Hence, it is believed that overriding this negative feedback by using5HT1A antagonists would potentially increase and accelerate the clinicalantidepressant response. Recent studies by Artigas et al., TrendsNeurosci., 19:378-383 (1996), suggest a combination of 5-HT1A activityand inhibition of 5-HT uptake within a single molecular entity canachieve a more robust and fast-acting antidepressant effect.

The present invention relates to a new class of molecules which have theability to act at the 5-HT1A autoreceptors and concommitantly with the5-HT transporter. Such compounds are therefore potentially useful forthe treatment of depression as well as other serotonin disorders.

U.S. Pat. No. 5,468,767 reports a series of substituted indoles of thefollowing formula for the treatment of disorders associated withdysfunction in serotonergic neurotransmission, including depression

wherein:

R₁ is hydrogen or C₁₋₄ alkyl and R₂ is C₁₋₄ alkyl or (CH₂)pAr.

WO 9415928 discloses a series of piperazine derivatives of the followingformula for the treatment of CNS disorders, including depression.

wherein:

R is hydrogen or alkyl;

R₁ and R₂ are each mono- or bicyclic aryl or heteroaryl radicals;

R₃ is hydrogen, alkyl, or a spirocycloalkyl group; and

n is 1 or 2 and m is 1 to 3.

WO 93/10092 discloses a series of cyclohexenes of the following formulafor treatment of dopaminergic disorders.

SUMMARY OF THE INVENTION

The compounds of this invention are arylpiperazinyl-cyclohexyl indolederivatives represented by Formula I:

Wherein:

R₁, R₂ and R₃ are each, independently, hydrogen, halogen, CF₃, alkyl,alkoxy, MeSO₂, or together can form a 5-7 membered carbocyclic orheterocyclic ring;

R₄ is hydrogen, halogen, or alkyl;

R₅ is hydrogen, alkyl, alkylaryl, or aryl;

R₆ is hydrogen, halogen, CF₃, CN, carbamide, or alkoxy;

X₁, X₂ and X₃ are each carbon or one of X₁, X₂ or X₃ may be nitrogen;

Y is carbon or nitrogen; and

Z is carbon or nitrogen; or

pharmaceutically acceptable salts thereof.

Preferably, the compounds of the present invention are those representedby Formula I, wherein R₁, R₂ and R₃ are each, independently, hydrogen,halogen, alkyl, alkoxy or together form a 5-7 membered carbocyclic orheterocyclic ring;

R₄ is hydrogen or halogen;

R₅ is hydrogen, alkyl or alkylaryl; and

R₆ is hydrogen, halogen, CN or alkoxy;

X₁, X₂, X₃, Y and Z are each carbon; or

pharmaceutically acceptable salts thereof.

More preferably, the compounds of the present invention are selectedfrom the following:

3-[cis-4-[4-(1H-Indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

4-Fluoro-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

4-Fluoro-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

5-Fluoro-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

6-Fluoro-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

6-Fluoro-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

5-Bromo-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

5-Bromo-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

5-Chloro-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

5-Chloro-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

3-{4-[(1,4-cis)-4-(1H-indol-4-yl)-piperazinyl-1-yl]cyclohexyl}-1H-indole-5-carbonitrile;

3-{4-[(1,4-trans)-4-(1H-indol-4-yl)-piperazinyl-1-yl]cyclohexyl}-1H-indole-5-carbonitrile;

5-Methoxy-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

5-Methoxy-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole;

3-[cis-4-[4-(1H-Indol-4-yl)-1-piperazinyl]cyclohexyl-]2-methyl-1H-indole;

3-[trans-4-[4-(1H-Indol-4-yl)-1-piperazinyl]cyclohexyl]-2-methyl-1H-indole;

3-1{(1,4-cis)-4-[4-1H-Indole-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-pyrrolo[2,3-b]pyridine;

3-{(1,4-trans)-4-[4-(1H-Indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-pyrrolo[2,3-b]pyridine;

6-Fluoro-1-methyl-3-{cis-4-[4-(1-methyl-1H-indol-4-yl)-1-piperazinyl]cyclohexyl}-1H-indole;

3-{(1,4-cis)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrle;

3-{(1,4-trans)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile;

1-Ethyl-3-{(1,4-cis)-4-[4-(1H-indole-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

3-{(1,4-cis)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1-propyl-1H-indole-5-carbonitrile;

3-{(1,4-trans)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1-propyl-1H-indole-5-carbonitrile;

3-{(1,4-cis)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1-isopropyl-1H-indole-5-carbonitrile;

3-{(1,4-trans)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]cyclohexyl}-1-isopropyl-1H-indole-5-carbonitrile;

1-Benzyl-3-{(1,4-cis)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

1-Benzyl-3-{(1,4-trans)-4-[4-(1H-indole-4-yl)-piperazin-1-yl]cyclohexyl}-1H-indole-5-carbonitrile;

1-Methyl-3-1{(1,4-cis)-4-[4-(1-methyl-1H-indol-4-yl)-piperazine-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

5-Fluoro-3-{(cis)-4-[4-(2-methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1H-indole;

5-Fluoro-3-{(1,4-cis)-4-[4-(2-methoxy-phenyl)-piperidin-1-yl]-cyclohexyl}-1H-indole;

5-Fluoro-3-{(1,4-trans)-4-[4-(2-methoxy-phenyl)-piperidin-1-yl]-cyclohexyl}-1H-indole;

5-methoxy-3-{(1,4-cis)-4-[4-(2-methoxy-phenyl)-piperazinyl-1-yl]-cyclohexyl}-1H-indole;

5-Methoxy-3-{(1,4-trans)-4-[4-(2-methoxy-phenyl)-piperidin-1-yl]-cyclohexyl}-1H-indole;

3-{(1,4-cis)-4-[4-(2-methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1H-pyrrolo[2,3-b]piperidine;

5-Fluoro-3-{(cis)-4-[4-(5-fluoro-2-methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1H-indole;

5-Fluoro-3-{(trans)-4-[4-(5-fluoro-2-methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1H-indole;

3-{(1,4-cis)-4-[4[(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl}-4-fluoro-1H-indole;

3-{(1,4-trans)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-4-fluoro-1H-indole;

3-{(1,4-cis)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-5-fluoro-1H-indole;

3-{(1,4-trans)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-5-fluoro-1H-indole;

3-{(1,4-cis)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl-]-cyclohexyl}-6-fluoro-1H-indole;

3-{(1,4-trans)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-6-fluoro-1H-indole;

3-{(1,4-trans)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-6-fluoro-1H-indole;

3-{(1,4-cis)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

3-{(1,4-trans)-4-(4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

8-{4-[(1,4-cis)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline;

8-{4-[(1,4-trans)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline;

8-{4-(1,4-cis)-4-[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline;

3-[(1,4-cis)-4-(4-Quinolin-8-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile;

3-[(1,4-trans)-4-(4-Quinolin-8-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile;

1-Methyl-3-[(1,4-cis)-4-(4-quinolin-8-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile;

5-Fluoro-3-{(1,4-cis)-4-[4-(6-fluoro-chroman-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole;

5-Fluoro-3-{(1,4-trans)4-[4-(6-fluoro-chroman-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole;

5-Fluoro-3-{(1,4-cis)-4-[4-(5-fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole;

5-Fluoro-3-{(1,4-trans)-4-[4-(5-fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole;

3-{(1,4-cis)-4-[4-(5-Fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

3-{(1,4-trans)-4-[4-(5-Fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

3-{(1,4-cis)-4-[4-(5-Fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile;

3-[(1,4-cis)-4-[4-(Benzofuran-7-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile;

3-[(1,4-trans)-4-[4-(Benzofuran-7-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile;

5-Fluoro-3-{4-[4-(2-methoxy-phenyl)-piperazin-1-yl]cyclohex-1-enyl}-1H-indole;

3-{4-[4-(1H-Indol-4-yl)-piperazin-1-yl]-cyclohex-1-enyl}-1H-indole-5-carbonitrile;

5-Fluoro-3-{(1,4-cis)-4-[4-(2-methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1,3-dihydro-indol-2-one;

5-Fluoro-3-{cis-4-[4-(1H-indol-4-yl)piperazinyl]-cyclohexyl}-1-methyl-1H-indole;

8{(1,4-cis)-4-[4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline;

8-{(1,4-trans)-4-[4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]piperazin-1-yl}-6-methoxy-quinoline;

3-{(1,4-cis)-4-[4-6-Methoxy-quinoline-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

3-{(1,4-trans)-4-[4-(6-Methoxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

6-Chloro-8-{4-[1,4-cis)-4-(5-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}quinoline;

6-Chloro-8-{4-[(1,4-trans)-4-(5-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}quinoline;

3-{(1,4-cis)-4-[(4-(6-Chloro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

3-{(1,4-trans)-4-[4-(6-Chloro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

5-Chloro-8-{4-[(1,4-cis)-4-(5-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline;

3-{(1,4-cis)-4-[4-(5-Chloro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

5-Fluoro-8-{4-[(1,4-cis)-4-(6-fluoro-1H-indole-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline;

5-Fluoro-8-{4-[(1,4-trans)-4-(6-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline;

3-{(1,4-cis)-4-[4-(2-Methyl-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

3-{(1,4-trans)-4-[4-(2-Methyl-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

4-{4-[(1,4-cis)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-2-trifluoromethyl-quinoline;

4-{4-[(1,4-trans)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-2-trifluoromethyl-quinoline;

3-{(1,4-cis)-4-[4-(2-Trifluoromethyl-quinolin-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

3-{(1,4-trans)-4-[4-(2-Trifluoromethyl-quinolin-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;

4-{4-[(1,4-cis)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline;

4-{4[(1,4-trans)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline;

3-{(1,4-cis)-4-[4-(6-Methoxy-quinolin-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile;and

3-{(1,4-trans)-4-[4-(6-Methoxy-quinolin-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile.

As used herein, the terms “alkyl” and “alkoxy” are meant to include bothstraight and branched carbon chains containing 1-6 carbon atoms. Theterm “aryl” is meant to include aromatic radicals of 6-12 carbon atoms.The term “halogen” is meant to include fluorine, chlorine, bromine andiodine.

The compounds of Formula I also may be used in the form of apharmaceutically acceptable acid addition salt having the utility of thefree base. Such salts, prepared by methods well known to those skilledin the art are formed with both inorganic or organic acids, for example:fumaric, maleic, benzoic, ascorbic, pamoic, succinic,bismethylenesalicylic, methanesulfonic, ethanedisulfonic, acetic,oxalic, propionic, tartaric, salicyclic, citric, gluconic, lactic,malic, mandelic, cinnamic, citraconic, aspartic, stearic, palmitic,itaconic, glycolic, p-aminobenzoic, glutamic, benzene-sulfonic,hydrochloric hydrobromic, sulfuric, cyclohexylsulfamic, phosphoric andnitric acids.

The compounds of the present invention may be prepared by any suitablemethod which will be recognized by those skilled in the art. However,the present compounds may be advantageously prepared according to anyone of Schemes 1-6 set forth below. In the Schemes, the intermediatecompounds exemplified hereinafter are identified in parenthesis. Thecompound produced in each of Schemes 1-6 is identified with reference tothe appropriate Example set forth below.

The preparation of such compounds is depicted in Schemes 1-6 below.

The following Schemes 37-39 were utilized to obtain the compounds ofExamples 86-114.

INTERMEDIATE 1 3-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-1H-indole (1a)

Indole (4.69, 40 mmol), 1,4-cyclohexanedione monoethylene ketal (6.3 g,40 mmol) and potassium hydroxide (13.2 g, 200 mmol) were heated toreflux in 70 ml methanol for 6 hours. The reaction was cooled and theproduct was isolated by filtration and washed with water to give 9.1 g(89%) of product.

3-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-4-fluoro-1H-indole (1b)

This compound was prepared in a similar fashion described above byreplacing indole with 4-fluoroindole (3 g, 22 mmol) to afford the titlecompound in quantitative yield as a white solid: mp at 140° C.(sublimated).

3-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-5-fluoro-1H-indole (1c)

5-Fluoroindole (4.96 g, 0.036 mol), 1,4-cyclohexanedione monoethyleneketal (7.17 g, 0.046 mol) and potassium hydroxide (6 g, 91 mmol) wereheated to reflux in 70 ml methanol for 6 hours. The reaction was cooledand the product was isolated by filtration and washed with water to give8.59 g (86%) of product as a white solid: mp 153-155° C.

3-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-6-fluoro-1H-indole (1d)

This compound was prepared in the manner described for intermediate 1aby replacing indole with 6-fluoroindole (5.14 g, 38 mmol)) to afford 10g (96.3%) of the title compound as a white solid: mp 196-197° C.

Elemental analysis for C₁₆H₁₆FNO₂; Calc'd: C, 70.32; H, 5.90; N, 5.13;Found: C, 70.62; H, 5.91; N, 5.08.

3-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-5-bromo-1H-indole (1e)

This compound was prepared in the manner described above forintermediate 1a by replacing indole with 5-bromoindole (7.84 g, 40mmol)) to afford 10.5 g (78%) of the title compound as a white solid; MSEI m/e 333 (M³⁰).

3-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-5-chloro-1H-indole (1f)

This compound was prepared in the manner described above forintermediate 1a by replacing indole with 5-chloroindole (5 g, 33 mmol))to afford 9.14 g (96%) of the title compound as a white solid: mp178-181° C.; MS EI m/e 273 (M⁺).

3-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-5-cyano-1H-indole (1g)

This compound was prepared in the manner described above forintermediate 1a by replacing indole with 5-cyanoindole (29.98 g, 0.21mol) to afford 29.32 g (50%) of the title compound as a white solid: mp158-160° C.

3-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-5-methoxy-1H-indole (1h)

This compound was prepared in the manner described above forintermediate 1a by replacing indole with 5 methoxy indole (5 g, 34 mmol)in 82% yield (7.95 g) as a white solid: mp 161-162° C.

3-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-2-methyl-1H-indole (1i)

A solution of 2-methyl-indole (2.0 g, 15.2 mmol), 1,4-cyclohexanedionemonoethylene ketal (4.76 g, 30.4 mmol) and potassium hydroxide (10 g,0.18 mol) were heated to reflux in 50 ml methanol for 48 hours. Themixture was poured into water (150 ml) and extracted with methylenechloride (2×200 ml). The organic layer was dried over anhydrousmagnesium sulfate, filtered, and solvent was removed under vacuum.Chromatography (25% ethyl acetate-hexanes) afforded a light tan solidwhich was washed with ethyl ether (20 ml) to afford 2.35 g (62%) ofproduct as a white solid: mp 136-137° C.

Elemental analysis for C₁₇H₁₉NO₂; Calc'd: C, 75.81; H, 7.11; N, 5.70;Found: C, 75.47; H, 7.26; N, 5.13.

3-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-1H-azaindole (1j)

This compound was prepared in the manner described above forintermediate 1a by replacing indole with 7-azaindole (3.65 g, 31 mmol)in 68% yield (5.42 g) as a white solid: mp 162-165° C.; MS EI m/e 256(M⁺).

INTERMEDIATE 2 3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-1H-indole (2a)

A mixture of 3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-1H-indole (8.0 g,31.3 mmol) and 10% palladium on carbon (1.3 g) in ethanol (700 ml) washydrogenated for 18 hours. The catalyst was filtered off and the solventremoved under vacuum to afford 8.01 g (99%) of product as a white solid.

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-4-fluoro-1H-indole (2b)

This compound was prepared in the manner described above forintermediate 2a by replacing3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-1H-indole with3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-4-fluoro-1H-indole (6.3 g)) toafford 4.44 g (70%) of the title compound as a white solid: mp 161-162°C.

Elemental analysis for C₁₆H₁₈FNO₂; Calc'd: C, 69.08; H, 6.59; N, 5.09;Found: C, 69.05; H, 6.56; N, 4.87.

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-5-fluoro-1H-indole (2c)

A mixture of of 3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-5-fluoro-1H-indole(8.5 g) and 10% palladium on carbon (2.72 g) in ethanol (200 ml) washydrogenated for 5 hours. The catalyst was filtered off and the solventremoved under vacuum. Chromatography (methanol-methylene chloride)afforded 7.55 g (82%) of product as a white solid: mp 183-185° C.

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-6-fluoro-1H-indole (2d)

This compound was prepared in the manner described above forintermediate 2a by replacing3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-1H-indole with3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-6-fluoro-1H-indole (9.54 g) toafford 5.83 g (60%) of the title compound as a white solid: mp 158-159°C.

Elemental analysis for C₁₆H₁₈FNO₂; Calc'd: C, 69.80; H, 6.59; N, 5.09;Found: C, 69.74; H, 6.48; N, 5.13.

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-5-bromo-1H-indole (2e)

A mixture of 3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-5-bromo-1H-indole(6.8 g, 20.34 mmol) and 5% platinum on carbon (5.0 g) in ethanol (500ml) was hydrogenated overnight. The catalyst was filtered off and thesolvent removed under vacuum. Chromatography (30% ethyl acetate-hexanes)afforded 5.0 g (73%) of product as a solid; MS EI m/e 336 (M⁺).

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-5-chloro-1H-indole (2f)

A mixture of 3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-5-chloro-1H-indole(0.18 g) and platinum oxide (0.02 g) in ethanol (20 ml) with ten dropsof acetic acid was hydrogenated overnight. The catalyst was filtered offand the solvent removed under vacuum. Chromatography (25% ethylacetate-hexanes) afforded 0.16 g (88%) of product as a white solid: mp205-206.5° C.

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-5-cyano-1H-indole (2g)

This compound was prepared in the manner described above forintermediate 2a by replacing3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-1H-indole with3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-5-cyano-1H-indole (54.6 g)) toafford 52.12 g (95%) of the title compound as a white solid in 95%(52.12 g) yield as a white solid: mp 153-155° C.

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-5-methoxy-1H-indole (2h)

This compound was prepared in the manner described above forintermediate 2a by replacing3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-1H-indole with3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-5-methoxy-1H-indole to afford 7.18g (96%) of the title compound as a white solid: mp 153-155° C.

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-2-methyl-1H-indole (2i)

A mixture of 3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-2-methyl-1H-indole(2.39 g, 8.9 mmol) and 10% palladium on carbon (0.35 g) in ethanol (80ml) was hydrogenated for 3 hours. The catalyst was filtered off and thena solution of methylene-methanol (80 ml) was used to dissolve any solidswithin the celite. The solvent removed under vacuum to afford 2.34 g(97%) of product as an off-white solid, which was triturated with ethylether (40 ml) to afford a white solid: mp 166-168° C. The mother liquorwas concentrated to afford another 1.2 g of product as a yellow solid.

Elemental analysis for C₁₇H₂₁NO₂; Calc'd: C, 75.25; H, 7.80; N, 5.16;Found: C, 75.17; H, 7.99; N, 5.12.

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-1H-azaindole (2j)

This compound was prepared in the manner described above forintermediate 2a by replacing3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-1H-indole (7.18 g) with3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-1H-azaindole (4.02 g) to afford2.7 g (67%) of the title compound as a white solid: mp 204-207° C.

Elemental analysis for C₁₃H₁₄N₂O; Calc'd: C, 72.87; H, 6.59; N, 13.07;Found: C, 72.44; H, 6.75; N, 12.81.

INTERMEDIATE 3 4-(1H-3-Indolyl)-cyclohexanone (3a)

A solution of 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-1H-indole (2.57 g, 10mmol) in 200 ml (1:1) tetrahydrofuran-hydrochloric acid (1N) was allowedto stir at room temperature for 16 hours. The solvent was evaporatedunder vacuum. The crude product was dissolved in ethyl acetate, washedwith 1N sodium hydroxide (3×150 ml). The organic layer was dried overanhydrous sodium sulfate, and filtered. Chromatography (40% ethylacetate-hexanes) afforded 1.9 g (89%) of product.

4-(4-Fluoro-1H-3-indolyl)-cyclohexanone (3b)

This compound was prepared in the manner described above for 3a byreplacing 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-1H-indole with3-(1,4-dioxa-spiro[4,5]dec-8-yl)-4-fluoro-1H-indole (4.0 g) to afford3.7 g (63%) of the title compound as a white solid: mp 104-106° C.

4-(5-Fluoro-1H-3-indolyl)-cyclohexanone (3c)

A solution of 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-fluoro-1H-indole (2.8g, 10 mmol) in 200 ml (1:1) tetrahydrofuran-hydrochloric acid (1N) wasallowed to stir at room temperature for 16 hours. The solvent wasevaporated under vacuum. The crude product was dissolved in ethylacetate, washed with 1N sodium hydroxide (3×150 ml). The organic layerwas dried over anhydrous sodium sulfate, and filtered. Chromatography(40% ethyl acetate-hexanes) afforded 2.1 g (91%) of product as yellowsolid: mp 112-114° C.

4-(6-Fluoro-1H-3-indolyl)-cyclohexanone (3d)

This compound was prepared in the manner described above forintermediate 3a by replacing 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-1H-indolewith 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-6-fluoro-1H-indole (5.4 g) toafford 19.29 g (99%) of the title compound as a white solid: mp 102-105°C.

Elemental analysis for C₁₄H₁₄NOF; Calc'd: C, 72.71; H, 6.10; N, 6.06;Found: C, 72.77; H, 5.98; N, 5.96.

4-(5-Bromo-1H-3-indolyl)-cyclohexanone (3e)

This compound was prepared in the manner described above forintermediate 3a by replacing 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-1H-indolewith 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-bromo-1H-indole (4.5 g) toafford 3.3 g (84%) of the title compound as a white solid: MS EI m/e 291(M⁺).

Calc'd: C, 75.25; H, 7.80; N, 5.16; Found: C, 75.17; H, 7.99; N, 5.12.

4-(5-Chloro-1H-3-indolyl)-cyclohexanone (3f)

This compound was prepared in the manner described above forintermediate 3a by replacing 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-1H-indolewith 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-chloro-1H-indole (2.12 g) toafford 1.13 g (60%) of the title compound as a clear oil: MS FAB m/e 248(M+H)⁺.

4-(5-Cyano-1H-3-indolyl)-cyclohexanone (3g)

This compound was prepared in the manner described above forintermediate 3a by replacing 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-1H-indolewith 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-cyano-1H-indole (6 g) to afford4.03 g (81%) of the title compound as a white solid: mp 162.5-164° C.

Elemental analysis for C₁₅H₁₄N₂O ; Calc'd: C, 75.61; H, 5.92; N, 11.76;Found: C, 75.82; H, 6.06; N, 11.72.

4-(5-Methoxy-1H-3-indolyl)-cyclohexanone (3h)

This compound was prepared in the manner described above forintermediate 3a by replacing 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-1H-indolewith 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-methoxy-1H-indole (5.85 g) toafford 4.2 g (85%) of the title compound as a white solid: mp 103-106°C.

4-(2-Methyl-1H-3-indolyl)-cyclohexanone (3i)

This compound was prepared in the manner described above forintermediate 3a by replacing 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-1H-indolewith 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-2-methyl-1H-indole (2.2 g) toafford 1.62 g (88%) of the title compound as a yellow thick oil: MS EIm/e 227 (M⁺).

4-(1H-3-pyrrolo[2,3-b]pyridyl)-cyclohexanone (3j)

This compound was prepared in the manner described above forintermediate 3a by replacing 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-1H-indolewith 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-1H-azaindole (2.48 g) to afford1.96 g (95%) of the title compound as a white solid: mp 162-164° C.

INTERMEDIATE 43-(1,4-Dioxa-spiro[4,5]dec-7-en-8-yl)-5-cyano-1-methyl-indole

To a suspension of sodium hydride (60%, 1.74 g, 0.073 mol) in anhydrousN,N-dimethylformamide (100 ml) was added3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-5-cyano-1H-indole (9.9 g, 0.035mol) at room temperature. The mixture was stirred for 30 minutes at roomtemperature, then methyl iodide (9 ml, 0.14 mol) was added at roomtemperature. The reaction was allowed to stir for 1 hour, then quenchedwith water (50 ml). The mixture was extracted with methylene chloride(3×150 ml) and water (3×150 ml). The organic layer was dried overanhydrous magnesium sulfate and filtered. The solvent was removed undervacuum. Chromatography (5% methanol-methylene chloride) afforded 2.54 g(24%) of product as a light yellow solid: mp 65-67° C.

Elemental analysis for C₁₈H₁₈N₂O₂; Calc'd: C, 73.45; H, 6.16; N, 9.52;Found: C, 73.17; H, 6.24; N, 9.43.

INTERMEDIATE 5 3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-5-cyano-1-methyl-indole(5a)

A mixture of 3-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-5-bromo-1H-indole(3.77 g) and 10% palladium on carbon (0.99 g) in ethanol-tetrahydrofuran(200:80 ml) was hydrogenated for 5 hours. The catalyst was filtered offand the solvent was removed under vacuum to afford a white powder whichwas washed with ethanol-hexanes (1:1) and dried under vacuum for 4 hoursto afford 2.75 g (12%) of product: mp 170-172° C.

Elemental analysis for C₁₈H₂₀N₂O₂; Calc'd: C, 72.95; H, 6.80; N, 9.45;Found: C, 72.79; H, 6.82; N, 9.35.

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-5-cyano-1-ethyl-indole (5b)

To a suspension of sodium hydride (60%, 1.63 g, 0.068 mol) in anhydrousN,N-dimethylformamide (150 ml) was added3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-cyano-1H-indole (9.0 g, 0.032 mol) atroom temperature. The mixture was stirred for 30 minutes at roomtemperature then ethylbromide (14.6 g, 0.13 mol) was added at roomtemperature. The reaction was allowed to stir for overnight, thenquenched with water (50 ml). The mixture was extracted with methylenechloride (3×150 ml) and water (3×150 ml). The organic layer was driedover anhydrous magnesium sulfate and filtered. The solvent was removedunder vacuum. Chromatography (hexanes) afforded 5.5 g (69%) of productas a white solid: mp 124-126° C.

Elemental analysis for C₁₉H₂₂N₂O₂; Calc'd: C, 73.52; H, 7.14; N, 9.02;Found: C, 73.56; H, 6.93; N, 8.95.

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-5-cyano-1-n-propyl-indole (5c)

This compound was prepared in the manner described above forintermediate 5b by replacing ethylbromide with n-propylbromide (13.1 g,11 mmol) to afford 4.33 g (75%) of the title compound as a oil: MS EIm/e 324 (M⁺).

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-5-cyano-1-iso-propyl-indole (5d)

This compound was prepared in the manner described above forintermediate 5b by replacing ethylbromide with isopropylbromide (10.2 g,83 mmol) in 62% yield (6.44 g) as a white solid: mp 114.5-116° C.; MS EIm/e 324 (M⁺).

3-(1,4-Dioxa-spiro[4,5]dec-8-yl)-5-cyano-1-benzyl-indole (5e)

This compound was prepared in the manner described above forintermediate 5b by replacing ethylbromide with benzylbromide (14.3 g, 84mmol) to afford 6.04 g (57%) of the title compound as a white solid: mp129-130° C.

Elemental analysis for C₂₃H₄N₂O₂; Calc'd: C, 77.39; H, 6.50; N, 7.52;Found: C, 76.59; H, 6.28; N, 7.47.

INTERMEDIATE 6 4-(5-Cyano-1-methyl-3-indolyl)-cyclohexanone (6a)

A solution of 3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-cyano-1-methyl-indole(5.5 g) in 150 ml (1:1) tetrahydrofuran-hydrochloric acid (1N) wasallowed to stir at room temperature for 16 hours, followed by theaddition of 4.49 g sodium bicarbonate. The mixture was extracted withmethylene chloride (3×100 ml), washed with brine (3×150 ml). The organiclayer was dried over anhydrous magnesium sulfate and filtered. Thesolvent was removed to afford a light brown solid which was boiled inethyl acetate-hexanes (1:1). The mixture was cooled to room temperatureand solid was collected and dried under vacuum to afford 2.06 g of thetitle compound as a solid: mp 150-152° C.

Elemental analysis for C₁₅H₁₅N₂O; Calc'd: C, 76.16; H, 6.39; N, 11.10;Found: C, 75.84; H, 6.34; N, 10.92.

4-(5-Cyano-1-ethyl-3-indolyl)-cyclohexanone (6b)

This compound was prepared in the manner described above forintermediate 6a by replacing3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-cyano-1-methyl-indole with3-(1,4-dioxa-spiro[4,5]-dec-8-yl)-5-cyano-1-ethyl-indole (6.77 g, 22mmol) to afford 4.33 g (75%) of the title compound as a white solid: mp124° C.

Elemental analysis for C₁₇H₁₈N₂O ; Calc'd: C, 76.66; H, 6.81; N, 10.52;Found: C, 76.30; H, 6.82; N, 10.25.

4-(5-Cyano-1-n-propyl-3-indolyl)-cyclohexanone (6c)

This compound was prepared in the manner described above forintermediate 6a by replacing3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-cyano-1-methyl-indole with3-(1,4-dioxa-spiro[4,5]-dec-8-yl)-5-cyano-1-n-propyl-indole (2.64 g, 8.2mmol) to afford 1.67 g (73%) of the title compound as a white solid: mp103-104° C.; MS EI m/e 280 (M⁺).

4-(5-Cyano-1-benzyl-3-indolyl)-cyclohexanone (6d)

This compound was prepared in the manner described above forintermediate 6a by replacing3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-cyano-1-methyl-indole with3-(1,4-dioxa-spiro[4,5]-dec-8-yl)-5-cyano-1-benzyl-indole (6.43 g, 20mmol) to afford 3.49 g (63%) of the title compound as a white solid: mp115-126° C.

Elemental analysis for C₂₂H₂₀N₂O; Calc'd: C, 80.46; H, 6.14; N, 8.53;Found: C, 80.42; H, 6.07; N, 8.49.

4-(5-Cyano-1-isopropyl-3-indolyl)-cyclohexanone (6e)

This compound was prepared in the manner described above forintermediate 6a by replacing3-(1,4-dioxa-spiro[4,5]dec-8-yl)-5-cyano-1-methyl-indole with3-(1,4-dioxa-spiro[4,5]-dec-8-yl)-5-cyano-1-isopropyl-indole (5.86 g, 16mmol) to afford 3.46 g (63%) of the title compound as a white solid: mp106-107° C.

Elemental analysis for C₁₈H₂₀N₂O; Calc'd: C, 77.11; H, 7.19; N, 9.Found: C, 76.85; H, 7.16; N, 9.

INTERMEDIATE 7 8-(4-Benzyl-piperazin-1-yl)quinoline

A solution of 8-amino-quinoline (12.91 g, 89 mmol) andbis(2-chloroethyl)benzylamine (25.95 g, 112 mmol) in n-butanol (65 ml)was allowed to heat at 85° C. for 11 hours. The mixture was poured into50% sodium hydroxide, extracted with methylene chloride and water. Theorganic layer was dried over anhydrous magnesium sulfate, and filtered.The solvent was removed under vacuum. Chromatography (methanol-methylenechloride) afforded 12.34 g of product as a solid: mp 116.5-118° C.

The HCl salt was prepared in ethyl acetate: mp 209-210° C. Elementalanalysis for C₂₀H₂₁N₃.2HCl.0.5H₂O; Calc'd: C, 62.34; H, 6.28; N, 10.91;Found: C, 62.37; H, 6.55; N, 10.80.

INTERMEDIATE 8 8-(Piperazin-1-yl)-quinoline

To a solution of 8-(4-benzyl-piperazin-1-yl)quinoline (2.63 g, 8.7 mmol)in methylene chloride (30 ml) was added vinyl chloroformate (1.1 ml, 13mmol) at room temperature slowly. The reaction mixture was refluxed for2 hours, and then concentrated under vacuum. The residue was dissolvedin 12 N hydrochloric acid (20 ml) and stirred at room temperature for 1hour. The mixture was concentrated, the residue was taken up with 40 mlethanol and heated up to 50° C. for 2 hours. The solvent was removedunder vacuum, the residue was dissolved in 1 N sodium hydroxide-ethylacetate and extracted with ethyl acetate and washed with water. Theorganic layer was dried over anhydrous sodium sulfate. The solvent wasremoved under vacuum. Chromatography (10-30% methanol-methylene chlorideplus ammonium hydroxide) afforded 1.86 g (90%) yellow oil; MS EI m/e 213(M)⁺.

INTERMEDIATE 9 6-Fluorochroman

A mixture of 6-fluoro-4-oxo-chroman (2 g, 12 mmol) and 10% palladium oncarbon (1 g) in concentrated hydrochloric acid (20 ml) and ethanol (30ml) was hydrogenated for 20 hours. The catalyst was filtered and thesolvent removed under vacuum. The residue was dissolved in ethyl acetate(100 ml), washed with 1N NaOH (6×200 ml) and water (3×150 ml), driedover anhydrous sodium sulfate, filtered and the solvent was removedunder vacuum. Chromatography (20% ethyl acetate-hexanes) afforded 1.41 g(77%) of product as a clear oil; MS EI m/e 152 (M⁺).

INTERMEDIATE 10 6-Fluoro-8-nitrochroman

A mixture of nitric acid (100%, 7.8 ml, 0.16 mol) in acetic anhydridewas maintained at room temperatue for 0.5 hour. This mixture was addedto a solution of 6-fluorochroman (11.9 g, 0.078 mol) in 40 ml aceticanhydride at 0° C. The reaction mixture was stirred at room temperaturefor 2 hours then poured into ice-water. The mixture was extracted withmethylene chloride (3×60 ml) and washed with saturated sodium carbonate(8×150 ml). The organic layer was dried over anhydrous sodium sulfateand filtered. The solvent was removed under vacuum to afford a yellowsolid: mp 48-50° C.

Elemental analysis for C₉H₈FNO₃; Calc'd: C, 54.83; H, 4.09; N, 7.10.Found: C, 54.78; H, 3.93; N, 6.09.

INTERMEDIATE 11 6-Fluoro-8-aminochroman

A mixture of 6-fluoro-8-nitrochroman (14.4 g) and 10% palladium oncarbon (2 g) in ethanol (160 ml) was hydrogenated for 2 hours. Thecatalyst was filtered off and the solvent removed under vacuum.Chromatography (30% ethyl acetate-hexanes) afforded 12.12 g (100%) ofproduct as a clear oil; MS EI m/e 167 (M⁺).

INTERMEDIATE 12 1-Benzyl-4-(6-fluoro-chroman-8-yl)-piperazine

A solution of 6-fluoro-8-aminochroman (1.24 g, 7.4 mmol) andbis(2-chloroethyl)-benzylamine (2.58 g, 11 mmol) in butanol (20 ml) wasstirred at 100° C. for 10 hours. The mixture was poured into saturatedsodium carbonate (950 ml) and extracted with ethyl acetate (3×60 ml).The organic layer was dried over anhydrous sodium sulfate and filtered.Chromatography (20% ethyl acetate-hexanes) afforded 1.64 g (68%) ofproduct as an oil; MS EI m/e 326 (M)⁺.

INTERMEDIATE 13 4-(6-Fluoro-chroman-8-yl)-piperazine

A mixture of 1-benzyl-4-(6-fluoro-chroman-8-yl)-piperazine (1.64 g, 5mmol), 10% palladium on carbon (0.4 g) and ammonium formate (0.64 g, 10mmol) in ethanol (20 ml) was allowed to reflux for 2 hours. The catalystwas filtered off and the solvent removed under vacuum. Chromatography(10-20% methanol-methylene chloride plus ammonium hydroxide) afforded1.0 g (84%) of product as a yellow oil; MS EI m/e 296 (M⁺).

INTERMEDIATE 14 2-(4-Fluorophenoxy)-acetaldehyde Diethyl Acetal

To a suspension of sodium hydride (5.4 g, 0.134 mol) in anhydrousN,N-dimethylformamide (100 ml) was added 4-fluorophenol (10 g, 0.089mol) at 0° C. After hydrogen evolution had ceased, bromo-acetaldehydediethyl acetal (16 ml, 0.11 mol) was added. The reaction was heated at160-170° C. for 18 hours. The mixture was poured into ice-water,extracted with ethyl acetate (3×150 ml), washed with 1N sodium hydroxide(3×100 ml), and brine (3×100 ml). The organic layer was dried overanhydrous sodium sulfate and filtered. The solvent was removed undervacuum. Chromatography (25% ethyl acetate-hexanes) afforded 16.36 g(80%) of product as a clear oil: MS EI m/e 228 (M⁺).

INTERMEDIATE 15 5-Fluorobenzofuran

To a mixture of benzene (200 ml) containing polyphosphoric acid (7.9 g,0.035 mol) was added 2-(4-fluoro-phenoxy)-acetaldehyde diethyl acetal (8g, 0.035 mol). The mixture was stirred vigorously while being heated toreflux for 2.5 hours. The reaction mixture was cooled to roomtemperature and decanted from the polyphosphoric acid. The solvent wasremoved under vacuum. Chromatography (5% ethyl acetate-hexanes) afforded3.4 g (45%) of product as a clear oil: ¹H NMR (CDCl₃) δ 6.74 (dd, 1H,J=2.0, 0.6 Hz), 7.01 (td, 1H, J=9, 2.7 Hz), 7.25 (dd, 1H, J=8.4, 2.7Hz), 7.43 (dd, 1H, J=9, 3.9 Hz), 7.65 (d, 1H, J=1.8 Hz).

INTERMEDIATE 16 5-Fluoro-2,3-dihydrobenzofuran

A solution of 5-fluorobenzofuran and 10% palladium on carbon in aceticacid (25 ml) was hydrogenated under 50 psi for 12 hours. The catalystwas filtered through celite and the celite was washed with methylenechloride (200 ml). The organic layer was washed sequentially with 1NNaOH (3×100 ml), brine (3×100 ml) and dried over anhydrous sodiumsulfate and filtered. The solvent was removed under vacuum to afforded2.59 g (85%) of product as a clear oil: ¹H NMR (300 MHz, CDCl₃): δ 3.12(t, 2H, J=8.7 Hz), 4.58 (t, 2H, J=8.7 Hz), 6.68 (dd, 1H, J=8.7, 4.2 Hz),6.79 (tm, 1H, J=8.7 Hz), 6.89 (dm, 1H, J=8.1 Hz).

INTERMEDIATE 17 5-Fluoro-7-nitro-2,3-dihydrobenzofuran

A mixture of nitric acid (100%, 1.5 ml, 36 mmol) in acetic anhydride (18ml) was maintained at room temperatue for 0.5 hour. The mixture wasadded to a solution of 5-fluoro-2,3-dihydrobenzofuran (2.5 g, 18 mmol)in 10 ml acetic anhydride at 10° C. The reaction mixture was stirred atroom temperature for 2 hours then poured into ice-water. The mixture wasextracted with methylene chloride (3×60 ml), washed with 1N sodiumhydroxide (5×100 ml) and brine (200 ml). The organic layer was driedover anhydrous sodium sulfate and filtered. The solvent was removedunder vacuum to afford a yellow solid: mp 113-114° C.

Elemental analysis for C₈H₆NO₃; Calc'd: C, 52.47; H, 3.30; N, 7.65;Found: C, 52.40; H, 3.21; N, 7.39.

INTERMEDIATE 18 5-Fluoro-7-amino-2,3-dihydrobenzofuran

A mixture of 5-fluoro-7-nitro-2,3-dihydrobenzofuran (2.65 g) and 10%palladium on carbon (0.5 g) in ethanol (100 ml) was hydrogenated for 3hours. The catalyst was filtered off and the solvent removed undervacuum. Chromatography (30% ethyl acetate-hexanes) afforded 1.38 g (62%)of product as a white solid: mp 68-70° C.

Elemental analysis for C₈H₈NO; Calc'd: C, 62.74; H, 5.27; N, 9.15;Found: C, 62.76; H, 5.32; N, 9.13.

INTERMEDIATE 191-Benzyl-4-(5-fluoro-2,3-dihydro-benzofuran-7-yl)-piperazine

A solution of 5-fluoro-7-amino-2,3-dihydrobenzofuran (1.38 g, 9 mmol)and bis(2-chloroethyl)-benzylamine (3.14 g, 14 mmol) in butanol (20 ml)was stirred at 100° C. for 10 hours. The salt was filtered off, washedwith ethyl ether (30 ml) and dried under vacuum: mp 232-233.5° C. Thesalt was converted to the free base to afford 2.06 g (73%) of the titlecompound.

Elemental analysis for C₁₉H₁₁FN₂O.HCl.0.25H₂O; Calc'd: C, 64.58; H,6.42; N, 7.93; Found: C, 64.43; H, 6.27; N, 7.86.

INTERMEDIATE 20 4-(5-Fluoro-2,3-dihydro-benzofuran-7-yl)-piperazine

A mixture of1-benzyl-4-(5-fluoro-2,3-dihydro-benzofuran-7-yl)-piperazine (2.06 g,6.6 mmol), 10% palladium on carbon (0.6 g) and ammonium formate (0.83 g,13 mmol) in ethanol (20 ml) was allowed to refux for 2 hours. Thecatalyst was filtered off and the solvent removed under vacuum.Chromatography (10-30% methanol-methylene chloride plus ammoniumhydroxide) afforded 1.10 g (75%) of product as a yellow oil; MS EI m/e222 (M)⁺.

INTERMEDIATE 21 Ethyl 7-nitrobenzofuran-2-carboxylate

A stirred mixture of 2-hydroxy-3-nitrobenzaldehyde (4.8 g, 59 mmol),diethyl bromomalonate (16.8 g, 71 mmol), potassium carbonate (12.1 g, 88mmol) and N,N′-terephthalylidenebis(4-butylaniline) (1.9 g, 5.9 mmol) intoluene (100 ml) was refluxed with a Dean-Stark trap for 24 hours.Another 12.1 g potassium carbonate was added to the above reactionmixture, and the resulting mixture was allow to reflux for another 3days. The reaction was quenched with water, extracted with (3×200 ml)and washed with 2.0 N sodium hydroxide (100 ml). The organic layer wasdried over anhydrous sodium sulfate and filtered. Chromatography (30%ethyl acetate-hexanes) afforded a yellow solid: mp 86.5-87.5° C. (lit¹:mp 88-89° C.).

INTERMEDIATE 22 7-Nitrobenzofuran

To a suspension of ethyl 7-nitrobenzofuran-2-carboxylate in ethanol wasadded 2 N potassium hydroxide (60 ml). After being heated at reflux for0.5 hour, the solution was cooled to room temperature and concentratedto half volume. Concentrated hydrochloric acid was added to the abovemixture and filtered. The solid was washed with water and dried undervacuum with phosphorous pentoxide overnight. The dried solid was mixedwith quinoline (75 ml) and copper oxide (CuO, 0.4 g). The mixture washeated up to 220° C. for 3 hours. The mixture was filtered and thefiltrate was concentrated. Chromatography (20% ethyl acetate-hexanes)afforded 5.3 g (91%) of product as a yellow solid: mp 92-94° C. (lit¹:mp 95.5-97° C.).

INTERMEDIATE 23 7-Aminobenzofuran Hydrochloride

A stirred suspension of 7-nitrobenzofuran (5.3 g, 32 mmol) and Raneynickel (0.1 g) in methanol (70 ml) was heated up to 50° C. Thenhydrazine monohydrate (98%, 4.8 ml, 97 mmol) in methanol (10 ml) wasslowly added to the above solution at temperature 50-60° C. When theaddition was complete, the mixture was allowed to reflux for 2 hours.The Raney nickel was filtered off and the solution was concentrated. Theresidue was dissolved in ethyl acetate and converted to its HCl salt3.68 g (66%) (lit¹: mp 212-213° C.).

INTERMEDIATE 24 1-(7-Benzofuranyl)piperazine

A solution of 7-aminobenzofuran hydrochloride (3.66 g, 22 mmol) andbis(2-chloroethyl)amine hydrochloride (3.84 g, 22 mmol) in chlorobenzene(80 ml) was heated to reflux for 72 hours. The solvent was removed undervacuum, the residue was dissolved in 2.5 N sodium hydroxide-methylenechloride and extracted with methylene chloride (3×100 ml). The organiclayer was dried over anhydrous sodium sulfate and filtered.Chromatography (10-20% methanol-methylene chloride plus ammoniumhydroxide) afforded 0.66 g (15%) of product as a brown-yellow oil;(lit¹: for HCl salt mp 194.5-195° C.).

INTERMEDIATE 25 4-(5-Fluoro-1H-3-indolyl)-cyclohex-3-enone

This compound was prepared in the manner described above forintermediate 3c by replacing 4-(5-fluoro-1H-3-indolyl)-cyclohexanoneethylene ketal with 4-(5-fluoro-1H-3-indolyl)-cyclohex-3-enone-ethyleneketal (1.37 g) to afford 1.01 g (88%) of the title compound.

INTERMEDIATE 261-(2-Methoxy-phenyl)-4-(1,4-dioxa-spiro[4,5]dec-8-yl)-piperazine

A solution of 1,4-cyclohexanedione monoethylene ketal (4.68 g, 30 mmol),1-(2-methoxy-phenyl)piperazine (5.8 g, 30 mmol), sodiumtriacetoxyborohydride (9 g, 42 mmol) and acetic acid (1.8 ml, 30 mmol)in 1,2-dichloroethane (8 ml) was allowed to stir at room temperature for12 hours. The reaction was quenched with 1N sodium hydroxide (pH>9), andextracted with methylene chloride (3×100 ml). The organic layer wasdried over anhydrous sodium sulfate and filtered. Chromatography (10%methanol-ethyl acetate) afforded 9.0 g (90%) of product as a semi-solid.

INTERMEDIATE 27 4-[4-(2-Methoxy-phenyl)-piperazin-1-yl]-cyclohexanone

This compound was prepared in the manner described above forintermediate 3a by replacing 3-(o 1,4-dioxa-spiro[4,5]dec-8-yl)1H-indolewith 1-(2-methoxy-phenyl)4-(1,4-dioxa-spiro[4,5]dec-8-yl)-piperazine(5.0 g, 15 mmol) to afford 4.0 g (93%) of the title compound.

INTERMEDIATE 285-Fluoro-3-{4-[4-(2-methoxy-phenyl)-piperazin-1-yl]cyclohex-1-enyl}-1H-indole

This compound was prepared in the manner described above forintermediate 1c b y replacing 1,4-cyclohexanedione monoethylene ketalwith 4-[4-(2-methoxy-phenyl)-piperazin-1-yl]-cyclohexanone (1.44 g, 5mmol). The crude mixture was used in next step without furtherpurification.

INTERMEDIATE 295-Fluoro-3-{4-[4-(2-methoxy-phenyl)-piperazin-1-yl]cyclohexyl}-1H-indole

This compound was prepared in the manner described above forintermediate 2c by replacing4-(5-fluoro-1H-3-indolyl)-cyclohex-3-en-ethylene ketal with5-fluoro-3-{4-[4-(2-methoxy-phenyl)-piperazin-1-yl]cyclohex-1-enyl}-1H-indole(2.0 g) to afford 1.77 g (84%) of product as a mixture of cis and transisomer.

INTERMEDIATE 30 4-(5-Fluoro-1-methyl-3-indolyl)-cyclohexanone

To a suspension of sodium hydride (60%, 0.18 g, 4.5 mmol) in anhydrousN,N-dimethylformamide (10 ml) was added4-(5-fluoro-1H-indol-3-yl)-cyclohexanone (0.7 g, 3.0 mmol) at roomtemperature. The mixture was stirred for 0.5 hour, then to the abovesolution was added iodomethane (0.21 ml, 3.3 mmol) at room temperature.The resulting mixture was stirred for another 0.5 hour and quenched withwater. The mixture was extracted with methylene chloride (3×50 ml) andthe organic layer was dried over anhydrous sodium sulfate and filtered.Chromatography (30% ethyl acetate-hexanes) afforded 0.35 g (46%) ofproduct as a yellow oil: MS EI m/e 245 (M⁺).

INTERMEDIATE 31 5-Nitro-quinoxaline

To a room temperature solution of 3-nitro-o-phenylenediamine (10 g, 65.3mmol) in EtOH (50 mL) was added glyoxal (40% in H₂O, 22.47 mL). Thereaction mixture was heated at reflux 1 hour, then diluted with H₂O (100mL). The cooled mixture was extracted with CH₂Cl₂ (2×300 mL) and theorganic layers were combined and washed again with H₂O (500 mL), driedover Na₂SO₄ and concentrated yielding a bright orange solid which wasrecrystallized from EtOAc/Hexanes to give 10.96 (96%) of a tan solid mp90-92° C.

Elemental Analysis for C₈H₅N₃O₂;

Calc'd C, 54.86; H, 2.88, N; 23.99 Found C, 55.12; H, 3.05; N, 24.05.

INTERMEDIATE 32 5-Amino-quinoxaline

To a three neck 250 mL round bottom flask equipped with a refluxcondenser and nitrogen inlet was added 5-nitro-quinoxaline (4 g, 22.8mmol) dissolved in HOAc (60 mL). The mixture was heated to boiling,removed from heat, and solid Fe powder (3.83 g, 68.6 mmol) was added.Vigorous boiling was observed. The reaction mixture was heated at reflux10 minutes and then poured into H₂O (100 mL) and ice. The aqueoussolution was filtered and basified to pH>10 with 1 M NaOH, and extractedin EtOAc (3×200 mL). The organic layers were combined, dried overNa₂SO₄, and concentrated. The resulting oil was purified by columnchromatography (40% EtOAc/Hexanes) yielding 2.03 g (61%) of an orangesolid: mp 87-90° C.

Elemental Analysis for C₈H₇N₃;

Calc'd C, 66.19; H, 4.86; N, 28.95 Found C, 66.25; H, 4.96; N, 29.26

INTERMEDIATE 33 1-Benzyl-4-(quinoxalin-yl)-piperazine

To a solution of 5-amino-quinoxaline (2.8 g, 19.3 mmol) in BuOH (50 mL)was added bis(2-chloroethyl)-benzlyamine (8.42 g, 38.6 mmol) and Et₃N(5.34 mL, 38.6 mmol). The reaction was stirred at 100° C. overnight. Asecond portion of Et₃N (5.34 mL, 38.6 mmol) was added and the reactionstirred at 100° C. an additional 24 hours. The cooled solution was madealkaline with 2.5 N NaOH (500 mL) and extracted into EtOAc (3×200 mL).The organic fractions were combined, dried over Na₂SO₄, concentrated andchromatographed (40% EtOAc/Hex) yielding 1.0 g (17%) of a gold oil.

INTERMEDIATE 34 5-(1-Piperazinyl)-quinoxaline

To a room temperature solution of 1-benzyl-4-(quinoxalin-yl)-piperazine(1.0 g, 3.3 mmol) in anhydrous CH₂Cl₂ under nitrogen was added vinylchloroformate (0.34 mL, 3.9 mmol) drop wise. The reaction mixture washeated at reflux 2 hours. The reaction was cooled, concentrated todryness and concentrated HCl (25 mL) and 1,4-dioxane (25 mL) were added.The resulting solution was stirred at ambient temperature overnight. Thesolution was basified with 2.5 N NaOH (300 mL) and extracted into EtOAc(3×200 mL). The organic layers were combined, dried over Na₂SO₄,concentrated and chromatographed (10% MeOH/CH₂Cl₂/NH₄OH) to give 450 mg(64%) of an orange solid: mp 106-108° C.: MS (+) ESI m/e 215 [M+H]⁺.

INTERMEDIATE 35a 5-(Trifluoromethylsulfonyloxy)-quinoline

A solution of 5-hydroxy-quinoline (8 g, 55 mmol) and K₂CO₃ (15.2 g, 110mmol) in anhydrous pyridine (60 mL) under nitrogen was cooled to −20° C.Tf₂O (13.97 mL, 83 mmol) was added drop-wise via syringe. The reactionmixture was stirred 1 hour at −20° C. then warmed to 0° C. for 1 hourthen stirred at ambient temperature for 48 hours. The reaction mixturewas then poured into H₂O (200 mL) and extracted in CH₂Cl₂ (2×200 mL).The aqueous layer was acidified with 1 N HCl (100 mL) and back extractedwith CH₂Cl₂ (2×200 mL). The organic fractions were dried over Na₂SO₄,concentrated and purified by column chromatography (40% EtOAc/Hexanes)affording 13.97 g (90%) of the product as a pink oil: MS EI m/e 277(M⁺).

INTERMEDIATE 35b 5-(Trifluoromethylsulfonyloxy)-isoquinoline

This compound was prepared in the manner described above forIntermediate 35a by replacing 5-hydroxy-quinoline with5-hydroxy-isoquinoline (5 g) to afford 7.71 g (79%) of the titlecompound as a waxy beige solid: MS ESI m/e 278 (M⁺).

INTERMEDIATE 35c 1-(Trifluoromethylsulfonyloxy)-isoquinoline

This compound was prepared in the manner described for Intermediate 35aby replacing 5-hydroxy-quinoline with isocarbastyril (8 g) to afford9.74 g (64%) of the title compound as a clear oil: MS EI m/e 277 (M⁺).

INTERMEDIATE 36a 1-t-butyl-4-(5-Quinolinyl)piperazine Carboxylate

To an oven-dried 100 mL flask was added Cs₂CO₃ (19.87 g, 61 mmol),Pd(OAc)₂ (0.49 g, 2.2 mmol), and BINAP (1.183 g, 1.9 mmol). The solidswere flushed with N₂ for 10 minutes. A solution of5-(trifluoromethylsulfonyloxy)-quinoline (12 g, 43 mmol) and1-t-butyl-4-piperazine carboxylate (9.67 g, 52 mmol) in THF was thenadded slowly to the reaction flask. The reaction mixture was stirred atroom temperature for 0.5 hour then at 65° C. overnight. The resultingsolution was diluted with ether, filtered through a bed of celite,washed with Et₂O (50 mL) and EtOAc (50 mL). The organic fractions werecombined, dried over Na₂SO₄, filtered, and chromatographed 3 times (10%MeOH/CH₂Cl₂) yielding 1.57 g (12%) of pure product as a beige solid: mp116-118° C.

Elemental Analysis for C₁₈H₂₃N₃O₂:

CaIc'd C, 68.98; H, 7.40; N, 13.41 Found C, 69.09; H, 7.33; N, 13.08

INTERMEDIATE 36c 1-t-butyl-4-(1-Isoquinolinyl)piperazine Carboxylate

This compound was prepared in the manner described above forIntermediate 36a, replacing 5-(trifluoromethylsulfonyloxy)-quinolinewith 1-(trfluoromethylsulfonyloxy)-isoquinoline (9 g, 32.5 mmol)yielding 2.33 g (25%) of a waxy beige solid: mp 69-71° C.

INTERMEDIATE 37a 5-(1-Piperazinyl)-quinoline

To a solution of 1-t-butyl-4-(5-quinolinyl)piperazine carboxylate (1.57g, 5 mmol) in CH₂Cl₂ (2 mL) at 0° C. was added a pre-cooled, premixed,solution of TFA (10 mL), CH₂Cl₂ (20 mL) and MeOH (10 drops). Thereaction was warmed slowly to room temperature and allowed to stirovernight. The resulting solution was concentrated, dissolved in H₂O (5mL) and CH₂Cl₂ (5 mL) and made alkaline with NaHCO₃ to pH 9. The aqueousportion was extracted 6×100 mL EtOAc and concentrated yielding 1.0 g(100%) of a yellow oil which solidified upon standing was not purifiedfurther.

INTERMEDIATE 37c 1-(1-Piperazinyl)-isoquinoline

This compound was prepared in the same manner as intermediate 37areplacing 1-t-butyl-4-(5-quinolinyl)piperazine carboxylate with1-t-butyl-4-(1-isoquinolinyl)piperazine carboxylate (2.33 g, 7.4 mmol)affording 1.5 g (95%) of a beige solid: mp 127-130° C.

INTERMEDIATE 38a 6-Methoxy, 8-Amino-quinoline

To a hot suspension of 6-methoxy, 8-nitro-quinoline in 100 mL of amixture of ethanol:acetic acid:water (2:2:1) 3.0 g of iron powder wereadded in portions. The reaction was refluxed for about 2½ hours, themixture was cooled, filtered over celite and basified with sodiumbicarbonate. The product was extracted with ether, dried and the solventwas removed under vaccum to give 3.2 g of the title compound. MS (ES)m/z (relative intensity): 175 (M+H+100).

INTERMEDIATE 38b 8-Amino, 6-Chloro-quinoline

To a hot suspension of (0.800 g) 6-chloro, 8-nitro-quinoline in 25 mL ofa mixture of ethanol:acetic acid:water (2:2:1) 0.5 g of iron powder wasadded in portions. The reaction was refluxed for about 1½ hours, themixture was cooled, filtered over celite and basified with sodiumcarbonate. The product was extracted with ether, dried and the solventwas removed under vaccum to give 0.5 g of the title compound. mp 70-73°C. MS (ES) m/z (relative intensity): 179 (M+H+).

Elemental analysis for C₉H₇ClN₂; Calculated: C: 60.52; H: 3.95; N:15.68; Found: C: 60.82; H: 3.77; N: 15.96.

INTERMEDIATE 39a 6-Methoxy, 8-Piperazino-quinoline

6-Methoxy, 8-amino-quinoline (8.2 g) and bis(chloroethyl)aminehydrochloride (9.0 g) were taken in 70 mL chlorobenzene and heated atabout 135° C. with vigorous stirring for 3 days. The reaction never wentto completion. The mixture was cooled. Water was added and extractedwith ether. The aqueous phase was basified with sodium carbonate andextracted with ethyl acetate, dried and the solvent removed. The crudeproduct was filtered through 300 mL of silica gel using 10% MeOH/CH₂Cl₂,20% MeOH/CH₂Cl₂, then 1% NH4OH/80% MeOH/19% CH₂Cl₂, to give 1.5 g of thedesired product. MS (ES) m/z (relative intensity): 244 (M+H+, 100).

INTERMEDIATE 39b 6-Chloro-, 8-Piperazino-quinoline

8-amino, 6-chloro-quinoline (0.980 g) and bis(chloroethyl)aminehydrochloride (0.980 g) were taken in 13 mL chlorobenzene and heated atabout 135° C. with vigorous stirring for 5 days. The reaction was cooledtaken in water and extracted with ether. The aquous phase is basifiedwith sodium carbonate and reextracted with ether, dried and the soventwas removed to give 0.400 g of the title compound. MS (ES) m/z (relativeintensity): 248 (M+H+).

INTERMEDIATE 39c 5-Chloro-, 8-Piperazino-quinoline

To a solution of 5-chloro, 8-(trifluoromethylsulfonyloxy)-quinoline (1.0g) in 15 mL chlorobenzene excess piperazine (1.0 g) was added. Themixture was heated at 120° C. for 2½ days. The reaction was cooled,poured on water and the product was extracted with ether, dried overmagnesium sulfate to give 0.480 g of product. MS (ES) m/z (relativeintensity): 248 (M+H+, 100).

INTERMEDIATE 39d 5-Fluoro, 8-Piperazino-quinoline

To a solution of 5-Fluoro, 8-(trifluoromethylsulfonyloxy)-quinoline (1g) in 5 mL chlorobenzene excess piperazine (2.0 g) were added. Themixture was heated at 120° C. for 2½ days. The reaction was cooled,poured on water and the product was extracted with ethyl acetate, theorganic phase was washed with dilute NaOH, then with water, dried andthe solvent was removed. The product was chromatographed on silica gelusing 15% methanol/methylene chloride then 79:20:1 methanol methylenechloride:NH₄OH to give 0.240 g of product. MS (ES) m/z (relativeintensity): 232 (M+H+, 100).

INTERMEDIATE 39e 8-Piperazino-quinaldine

To a solution of 8-(trifluoromethylsulfonyloxy)-quinaldine (7 g) in 25mL chlorobenzene, K₂CO₃ (3.3 g) and excess piperazine (10.0 g) wereadded. The mixture was heated at 130° C. for 3 days. The reaction wascooled, poured on water and the product was extracted with ethylacetate, dried over magnesium sulfate. The product was chromatographedon silica gel using 20% methanol/methylene chloride then 79:20:1methanol:methylene chloride:NH₄OH to give 3.2 g of product. MS (ES) m/z(relative intensity): 228 (M+H+, 100).

INTERMEDIATE 39f 6-MeO, 4-Piperazino-quinoline

To a solution of 6-MeO, 4-(trifluoromethylsulfonyloxy)-quinoline (2 g)in 10 mL acetonitrile, excess piperazine (2 g) was added. The mixturewas heated at about 70° C. for 1½ hours. Water is added and the productis extracted with ethyl acetate, dried and the solvent was removed togive (2.5 g) of product. MS (ES) m/z (relative intensity): 308 (M+H+).

INTERMEDIATE 40a 6-Chloro, 8-Nitro-quinoline

A solution of 1.0 g of 6-Chloro-quinoline in 5 ml fuming nitric acid,was heated to almost reflux for 2 days. The reaction was cooled, pouredonto ice water and neutralized with concentrated ammonium hydroxide toabout pH 5. The formed precipitate was filtered and dried to give 0.600g of desired product. mp 149-155° C. MS (ES) m/z (relative intensity):209 (M+H+).

INTERMEDIATE 40b 5-Cl-8-(Trifluoromethylsulfonyloxy)-quinoline

To a suspension of 5-Chloro, 8-hydroxy-quinoline (8.95 g) in 100 mLCH₂Cl₂, TEA is added (20 mL). The suspension dissolved, then cooled to−15° C. A solution of 21.1 g of triflic anhydride in 50 mL of CH₂Cl₂1 isadded drop by drop with cooling. After complete addition, the reactionwas stirred at −15° C. for1hour; The reaction was diluted with CH₂Cl₂,washed with a solution of NaHCO₃, then with water dried and the solventwas removed to give 15.0 gr of product. mp 80-83° C. MS (ES) m/z(relative intensity): 312 (M+H+, 100). Elemental analysis forC₁₀H₅ClF₃NO₃S; Calculated: C: 38.54; H: 1.62; N: 4.49; Found: C: 38.3;H: 1.73; N: 4.5.

INTERMEDIATE 40c 5-Fluoro-8-(trifluoromethylsulfonyloxy)-quinoline

To a cold solution (−15° C.) of 5-Fluoro, 8-hydroxy-quinoline (2.5 g) in20 mL CH₂Cl₂, TEA is added (6.3 mL). To the cold mixture a solution of6.5 g of triflic anhydride in 10 mL of CH₂Cl₂, is added drop by dropwith cooling. After complete addition, the reaction was stirred at 0° C.for 1 hour; The reaction was quenched with water, and the product wasextracted with ether, dried and the solvent was removed to give 3.4 g ofproduct. MS (ES) m/z (relative intensity): 296 (M+H+, 100).

INTERMEDIATE 40d 8-(Trifluoromethylsulfonyloxy)-quinaldine

To a cold solution (−15° C.) of 8-hydroxy-quinaldine (11.5 g) in 50 mLCH₂Cl₂, TEA is added (29 mL). To the cold mixture a solution of 29.6 gof triflic anhydride in 50 mL of CH₂Cl₂, were added drop by drop withcooling. After complete addition, the reaction was stirred at −15° C.for 1 hour; The reaction was quenched with water, and the product wasextracted with ether, dried and the solvent was removed to give 20 g ofproduct. MS (ES) m/z (relative intensity): 292 (M+H+).

INTERMEDIATE 41 6-MeO, 4-(Trifluoromethylsulfonyloxy)-quinoline

To a cold solution (−15° C.) of 6-MeO, 4-hydroxy-quinoline (5 g) in 30mL CH₂Cl₂, TEA is added (12 mL). To the cold mixture a solution of 12 gof triflic anhydride in 15 mL of CH₂Cl₂, were added drop by drop withcooling. After complete addition, the reaction was stirred at −15° C.for 1 hour; The reaction was quenched with water, and the product wasextracted with ether, dried and the solvent was removed to give 7 g ofproduct. MS (ES) m/z (relative intensity): 308 (M+H+).

INTERMEDIATE 42a 1-Benzyl-4-(6-methoxy-2-methylquinolin-8-yl)piperazine

A mixture of 8-amino-6-methoxy-2-methylquinolin (1.75 g, 9.30 mmol),N-benzyl-bis-dichloroethane (8.9 g, 38.3 mmol), and triethylamine (6.5mL, 46.6 mmol) in 1-butanol (25 mL) was heated at 100° C. for 20 hours.After cooling to room temperature, the reaction was diluted with ethylacetate (50 mL), and poured into saturated aqueous NaHCO₃. The aqueouslayer was extracted with ethyl acetate (3×50 mL). The combined organiclayers were washed with saturated aqueous NaHCO₃ (50 mL) and brine (50mL), then were dried over anhydrous sodium sulfate, filtered andconcentrated in vacuo. Excess 1-butanol was azeotroped with hexane(2×500 mL). Flash chromatography on 5.5×18 cm SiO₂ (25% EtOAc/hexane)afforded 1.15 g (36%) of a yellow oil, which crystallized on standing.Recrystallization from hexane provided 0.898 g (28%) of analyticallypure product as yellow crystals: mp 83-85° C.

Elemental analysis for C₂₂H₂₅N₃O; Calc'd: C, 76.05; H, 7.25; N, 12.09;Found: C, 75.88; H, 7.37; N, 12.05.

INTERMEDIATE 42b 1-Benzyl-4-(6-methoxy-3-methylquinolin-8-yl)piperazine

The title compound was prepared by the same method used for1-benzyl4-(6-methoxy-2-methylquinolin-8-yl)piperazine, exceptsubstituting 8-amino-6-methoxy-3-methylquinoline (2.82 g, 15.0 mmol) forthe 8-amino-6-methoxy-2-methylquinoline. Flash chromatography on 6×20 cmSiO₂ (25-30% EtOAc/hexane), with rechromatography of the mixedfractions, provided 1.13 g (22%) of the title compound as a yellow gum.Crystallization from hexane afforded 0.88 g of analytically purecompound as yellow crystals: mp 112-113° C.

Elemental analysis for C₂₂H₂₅N₃O; Calc'd: C, 76.05; H, 7.25; N, 12.09;Found: C, 75.83; H, 7.26; N, 12.07.

INTERMEDIATE 42c 1-Benzyl-4-(6-methoxy-4-methylquinolin-8-yl)piperazine

A mixture of 8-amino-6-methoxy-4-methylquinoline (3.0 g, 15.9 mmol),N-benzyl-bis-dichloroethane (11.1 g, 48.0 mmol), triethyl amine (4.8 g,48 mmol) and 1-butanol were heated to 100° C. for 24 hours. The reactionmixture was poured into 2.5 N aqueous NaOH and extracted with ethylacetate (3×200 mL). The combined organic layers were washed with water(100 mL) and brine (100 mL), then were dried over anhydrous sodiumsulfate, filtered and concentrated to afford 12.0 g of a dark brown oil.Flash chromatography on silica gel (5% methanol/ethyl acetate) provided2.3 g (42%) of the title compound as a thick oil, which solidified uponstanding: mp 154-155° C.

Elemental analysis for C₂₂H₂₅N₃O; Calc'd: C, 76.05; H, 7.25; N, 12.09;Found: C, 75.92; H, 7.36; N, 11.96.

INTERMEDIATE 43a 4-(6-Methoxy-2-methylquinolin-8-yl)piperazine

A mixture of 1-benzyl-4-(6-methoxy-2-methylquinolin-8-yl)piperazine(0.527 g, 1.52 mmol), 10% Pd/C (0.20 g), and ammonium formate (0.96 g,15.2 mmol) in methanol (10 mL) were heated at reflux under N₂ for 3hours. TLC analysis (35% EtOAc/hexane) indicated only a trace ofstarting material remained. After cooling to room temperature, thereaction was filtered through celite, washing with excess methanol. Thefiltrate was concentrated, diluted with CH₂Cl₂ (50 mL), and washed withsaturated aqueous NaHCO₃. The aqueous layer was extracted with CH₂Cl₂(2×50 mL). The combined organic layers were dried over anhydrous sodiumsulfate, filtered, and concentrated in vacuo to afford 0.37 g (95%) ofthe title compound as a yellow oil, which was used in the subsequentreaction without purification.

INTERMEDIATE 43b 4-(6-Methoxy-3-methylquinolin-8-yl)piperazine

The title compound was prepared by the same method used for thepreparation of 4-(6-methoxy-2-methylquinolin-8-yl)piperazine, except1-benzyl-4-(6-methoxy-3-methylquinolin-8-yl)piperazine (0.32 g, 0.92mmol) was substituted for the1-benzyl-4-(6-methoxy-2-methylquinolin-8-yl)piperazine. The titlecompound was isolated in nearly quantitative yield and used withpurification in the subsequent reaction.

INTERMEDIATE 43c 4-(6-Methoxy-4-methylquinolin-8-yl)piperazine

A mixture of 1-benzyl-4-(6-methoxy-4-methylquinolin-8-yl)piperazine (2.0g, 5.76 mmol), methylene chloride (50 mL) and vinyl chloroformate (0.8mL, 8.64 mmol) were refluxed for 4 hours. The mixture was concentrated,then dissolved in a 1:1 mixture of dioxane/conc. HCl and stirred atambient temperature for 18 hours. The reaction mixture was made basicwith 2.5 N aqueous NaOH and extracted with ethyl acetate (2×200 mL). Thecombined organic layers were washed with water (100 mL) and brine (100mL), then were dried over anhydrous sodium sulfate, filtered, andconcentrated to give 0.6 g (47%) of the title compound: mp 208-209° C.

Elemental analysis for C₁₅H₁₉N₃O.HCl.0.5H₂O; Calc'd: C, 59.50; H, 6.99;N, 13.88; Found: C, 59.44; H, 7.09; N, 13.57.

INTERMEDIATE 44a 1-Benzyl-4-(6-methoxy-5-methylquinolin-8-yl)piperazine

This compound was prepared in a manner similar to that used for1-benzyl-4-(6-methoxy-4-methylquinolin-8-yl)piperazine to give 3.0 g(56%) of pure title compound: mp 129-133° C.

Elemental analysis for C₂₂H₂₅N₃O; Calc'd: C, 76.05; H, 7.25; N, 12.09;Found: C, 75.61; H, 7.35; N, 11.97.

INTERMEDIATE 44b 1-Benzyl-4-(6-methoxy-5-chloro-quinolin-8-yl)piperazine

This compound was prepared in a manner similar to that used for1-benzyl-4-(6-methoxy-4-methylquinolin-8-yl)piperazine to give 1.9 g(35%) of pure title compound: mp 138-140° C.

Elemental analysis for C₂₁H₂₂ClN₃O; Calc'd: C, 68.56; H, 6.03; N, 11.42;Found: C, 68.26; H, 5.98; N, 11.45.

INTERMEDIATE 45a 4-(6-Methoxy-5-methylquinoline-8-yl)piperazine

A mixture of methanol (15mL), 10% Pd/C (0.12 g),1-benzyl-4-(6-methoxy-5-methylquinolin-8-yl)piperazine (0.8 g, 2.3mmol), and ammonium formate (0.88 g, 13.9 mmol) were refluxed for 45minutes. The reaction mixture was filtered through celite andconcentrated. The residue was diluted with 1 N aqueous NaOH (50 mL) andextracted with ethyl acetate (3×75 mL). The combined organic layers werewashed with water (50 mL) and brine(50 mL), then were dried overanhydrous Na₂SO₄, filtered, and concentrated to give 0.52 g (61%) of thetitle compound as a thick oil. MS (ES) m/z: 258 (M+H+).

INTERMEDIATE 45b 4-(6-Methoxy-5-chloro-quinolin-8-yl)piperazine

This compound was prepared in a manner as similar to that used4-(6-methoxy-5-methylquinoline-8-yl)piperazine to give 0.48 g (68%) ofpure title compound as a thick oil. MS (ES) m/z: 278 (M+H+).

INTERMEDIATE 46 5-Bromo-6-methoxy-quinoline

To a solution of 6-methoxyquinoline (5 g, 31.4 mmol) in acetic acid (50mL) was slowly added Br₂ neat (1.62 mL, 31.4 mmol). The reaction mixturewas stirred at ambient temperature for 1 hour and then poured onto ice.Saturated aqueous sodium bisulfite was added, and the resulting slurrywas extracted into EtOAc (2×200 mL). The organic fractions werecombined, dried over Na₂SO₄, concentrated, and purified by columnchromatography (5% MeOH/CH₂Cl₂) affording 4.39 g of the title compoundas the acetate salt. The free base was prepared by washing the salt with1 N NaOH (50 mL) and H₂O (100 mL) and extracting into CH₂Cl₂ (200 mL).The organic fractions were concentrated affording 3.89 g (52%) of thetitle compound as a pink solid.

Elemental analysis for C₁₀H₈BrNO; Calc'd: C, 50.45; H, 3.39; N, 5.88;Found: C, 50.34; H, 3.25; N, 6.09.

INTERMEDIATE 47 4-Bromo-2-nitrophenylamine

To a solution of 2-nitro-phenylamine (13.8 g, 100 mmol) in HOAc (150 mL)was added NBS (18 g, 101 mmol). The reaction mixture was stirred andheated to reflux over 1 hour. The cooled reaction mixture was pouredinto H₂O (1000 mL) and stirred for 15 minutes. The resulting orangeslurry was filtered and washed with H₂O (300 mL) affording a 20.26 g(93%) of the title compound as a bright orange solid.

Elemental analysis for C₆H₅BrN₂O₂; Calc'd: C, 33.21; H, 2.32; N, 12.91;Found: C, 33.15; H, 2.31; N, 12.75; Ref: Montash Chem EN 1994, 125 p.723-730.

INTERMEDIATE 48 6-Bromo-8-nitro-quinoline

A sulfuric acid solution was prepared by adding H₂SO₄ (50 mL) to an 250mL flask containing H₂O (20 mL) cooled in an ice bath. To this solutionwas added glycerol (12 mL, 16.5 mmol), m-nitrobenzene sulfonic acidsodium salt (11.4 g, 5.06 mmol), and 4-bromo-2-nitrophenylamine (10 g,4.6 mmol). The reaction mixture was heated at 135° C. for 3 hours. Thewarm reaction mixture was poured into ice H₂O (200 mL) and extractedinto 50% MeOH/EtOAc (2×200 mL), dried over Na₂SO₄ and concentrated. Theresulting brown solid was triturated with EtOH and filtered affording3.8 g (33%) of a pink solid: mp 172-174° C.

Elemental analysis for C₉H₅BrN₂O₂; Calc'd: C, 42.72; H, 1.99; N, 11.07;Found: C, 42.69; H, 1.85; N, 11.01; Ref: Mantash Chem EN 1994, 125 p.723-730.

INTERMEDIATE 49 6-Bromo-8-amino-quinoline

To a solution of 6-bromo-8-nitro-quinoline (4 g, 1.58 mmol) inEtOH/HOAc/H₂O (50 mL/50 mL/25 mL) was added iron metal (3.18 g, 5.69mmol). The resulting solution was heated at reflux for 3 hours. Thecooled reaction mixture was neutralized with 2.5 N NaOH, filteredthrough celite to remove iron solids and washed with EtOAc. The eluentwas extracted into EtOAc (3×200 mL), combined, dried over Na₂SO₄ andconcentrated. The resulting oil was purified by column chromatography(40% EtOAc/hexanes) affording 3.19 g (91%) of a yellow solid: mp142-145° C.

Elemental analysis for C₉H₇BrN₂; Calc'd: C, 48.46; H, 3.16; N, 12.56;Found: C, 48.04; H, 2.93; N, 12.36.

INTERMEDIATE 50 8-(4-Benzyl-piperazin-1-yl)-6-bromo-quinoline

The free base of bis(2-chloroethyl)-benzlyamine (5.12 g, 19.3 mmol) wasprepared by washing the HCl salt with 1 M NaOH (200 mL) and extractinginto EtOAc. The resulting organic phases were dried over Na₂SO₄ andconcentrated. To this flask was added 6-bromo-8-amino-quinoline (2.15 g,9.6 mmol), n-BuOH (100 mL), and Et₃N (4 mL, 28.9 mmol). The resultingreaction mixture was stirred at 100° C. overnight. TLC analysis showedstarting amine was still present, therefore an additional portion ofbis(2-chloroethyl)-benzylamine hydrochloride (5 g) was added. Thereaction was heated an additional 72 hours. The cooled reaction mixturewas quenched with 1 M NaOH (200 mL) and extracted into EtOAc (3×200 mL).The organic fractions were combined, dried over Na₂SO₄, andconcentrated. The resulting gold oil was purified three times by columnchromatography (40% EtOAc/hexanes) affording 1.2 g (33%) of a viscousorange oil which solidified upon standing: mp 65-68° C., MS (+) APCI m/z382 [M+H]⁺.

Elemental analysis for C₂₀H₂₀BrN₃.0.75H₂O; Calc'd: C, 60.69; H, 5.48; N,10.62; Found: C, 60.81; H, 5.02; N, 10.88.

INTERMEDIATE 51 6-Bromo-8-piperazin-1-yl-quinoline

To a solution of 8-(4-benzyl-piperazin-1-yl)-6-bromo-quinoline (1.6 g,4.2 mmol) in dichloroethane (50 mL) under a N₂ atmosphere was addedchloroethylchloroformate (1.26 mL, 12.6 mmol) and the reaction mixturewas heated at 80° C. for 4 hours, and at ambient temperature overnight.No reaction was observed by TLC, therefore vinyl chloroformate (0.35 mL,6.3 mmol) was added and the reaction was heated at 80° C. for another 4hours. The cooled reaction was poured into H₂O and extracted into CH₂Cl₂(2×100 mL) and EtOAc (100 mL). The organic fractions were combined,dried over Na₂SO₄, and left in EtOAc overnight. The organic layer wasconcentrated and purified by column chromatography(10%MeOH/CH₂Cl₂+NH₄OH) affording 1.03 g (84%) of a brown foam. MS (+)APCI m/z 292 [M+H]⁺.

INTERMEDIATE 52 6-Hydroxy-8-nitro-quinoline

A solution of 6-methoxy-8-nitro-quinoline (9 g, 44.1 mmol) in HBr (100mL) was heated at 110° C. overnight. Additional HBr (80 mL) was addedand the reaction continued to heat for an additional 24 hours. Thecooled reaction mixture was basified with 2.5 N NaOH (800 mL) andextracted into EtOAc (2×300 mL). The organic fractions were combined,dried over Na₂SO₄ and purified by column chromatography (50%EtOAc/hexane) to afford 2.71 g (32%) of the title compound as a whitesolid: mp discolors above 100° C., MS (−) ESI m/z 189 [M−H]⁻.

INTERMEDIATE 53 6-Ethoxy-8-nitro-quinoline

A solution of 6-hydroxy-8-nitro-quinoline (2.5 g, 13.2 mmol),ethylbromide (1.08 mL, 14.5 mmol), and K₂CO₃ (4 g, 26.4 mmol) in DMF (50mL) under a nitrogen atmosphere was heated at 40° C. for 5 hours. Thecooled reaction mixture was poured into H₂O (200 mL) and extracted intoEtOAc (2×200 mL). The organic fractions were combined, dried over Na₂SO₄and concentrated. The resulting beige solid was triturated with 40%EtOAc/hexane to give 2.46 g (85%) of the title compound as beigecrystals.

Elemental analysis for C₁₁H₁₀N₂O₃; Calc'd: C, 60.55; H, 4.62; N, 12.84;Found: C, 60.15; H, 4.50; N, 12.75.

INTERMEDIATE 548-(4-Benzyl-piperazin-1-yl)-6-methoxy-1,2,3,4-tetrahydroquinoline

A solution of 8-(4-benzyl-piperazin-1-yl)-6-methoxy-quinoline (1 g, 3mmol) in HOAc (100 mL) was hydrogenated over PtO₂ (300 mg) at 40 psiovernight. The reaction mixture was filtered through a pad of celite andwas washed with EtOAc (50 mL). The filtrate was concentrated. Theresulting gold oil was purified by column chromatography(10%MeOH/CH₂Cl₂+NH₄OH) affording 330 mg (45%) of a viscous gold oil. Ananalytical sample was prepared as the HCl salt from EtOAc. MS EI m/z 247M⁺.

Ref: J. Chem Soc Perkins I 1980 p. 1933-1939.

INTERMEDIATE 55 [1,6]Naphthyridine

A sulfuric acid solution was prepared by adding H₂SO₄ (100 mL) to H₂O(57 mL) cooled in an ice bath. To this solution was added glycerol (33mL, 457 mmol), m-nitrobenzene sulfonic acid sodium salt (48 g, 212 mmol)and 4-amino-pyridine (10 g, 106 mmol). The reaction mixture was heatedat 135° C. for 4 hours. The cooled reaction mixture was basicified with2.5 N NaOH (500 mL) with cooling in an ice bath, and extracted intoCH₂Cl₂ (3×200 mL). The organic fractions were combined, dried overNa₂SO₄ and concentrated. The resulting oil was purified by columnchromatography (5% MeOH/CH₂Cl₂) affording 5.04 g (36%) as a dark orangeoil. An analytical sample was prepared as the HCl salt from EtOAcyielding an orange low melting solid. MS EI m/z 130 M⁺.

Ref: Chem Pharm Bull. 1971, 19, 9, p. 1751-1755.

INTERMEDIATE 56 8-Bromo-[1,6]-naphthyridine

To a stirred solution of [1,6]-naphthyridine (4.73 g, 36.4 mmol) in CCl₄(200 mL) was added Br₂ (2.25 mL, 43.7 mmol) in CCl₄ (35 mL) dropwise viaan addition funnel. The resulting solution was heated at reflux for 1hour. Pyridine (2.94 mL, 36.4 mmol) in CCl₄ (30 mL) was added dropwiseto the refluxing solution, and the mixture was refluxed overnight. Thecooled reaction mixture was filtered, and the solids were digested with1 M NaOH (200 mL) for 1 hour. The basic solution was extracted intoCH₂Cl₂ (2×200 mL), and the organic fractions were combined, dried overNa₂SO₄ and concentrated. The resulting oil was purified by columnchromatography (10% EtOAc/CH₂Cl₂) affording 2.03 g (27%) of the titlecompound as yellow crystals: mp 79-81° C.

Elemental analysis for C₈H₅BrN₂; Calc'd: C, 45.97; H, 2.41; N, 13.40;Found: C, 45.72; H, 2.34; N, 13.36; Ref: JOC 1968, 33, 4, p. 1384-1387.

INTERMEDIATE 57 8-Piperazin-1-yl-[1,6]-naphthyridine

To an oven-dried 100 mL flask under a nitrogen atmosphere was added8-bromo-[1,6]-naphthyridine (1.3 g, 6.2 mmol), piperazine (3.21 g, 37.3mmol), and sodium t-butoxide (900 mg, 9.33 mmol). The solids weresuspended in anhydrous o-xylenes (40 mL), and Pd(dba) (285 mg, 5 mol %)and P(t-Bu)₃ (0.31 mL, 1.24 mmol) were added. The reaction mixture washeated at 120° C. for 3 hours. The cooled reaction mixture was pouredinto H₂O (100 mL) and extracted into EtOAc (1×100 mL) and CH₂Cl₂ (2×100mL). The organic fractions were combined, dried over Na₂SO₄,concentrated, and the resulting oil was chromatographed (10%MeOH/CH₂Cl₂+NH₄OH) affording 470 mg (35%) of the title compound as adark gold oil. An analytical sample was prepared as the HCl salt fromEtOAc giving a brown solid: mp decomposes above 200° C. MS (+) APCI m/z215 [M+H]⁺.

Ref: Tet. Lett. 1998, 39, p. 617-620.

INTERMEDIATE 58 4-(6-Methylamino-quinolin-8-yl)-piperazine-1-carboxylicAcid Ethyl Ester

To an oven-dried 25 mL round bottom flask was added Cs₂CO₃ (1.55 g, 4.76mmol), BINAP (300 mg, 3 mol %), Pd(OAc)₂ (100 mg, 3 mol %) and keptunder vacuum overnight. To this reaction vessel under a nitrogenatmosphere was added 8-(4-benzyl-piperazin-1-yl)-6-bromo-quinoline (1.3g, 3.4 mmol), anhydrous toluene (12 mL) and benzylmethylamine (0.53 mL,4.1 mmol). The reaction mixture was heated at 100° C. overnight. Thecooled reaction mixture was diluted with Et₂O (15 mL), filtered toremove solids, washed with EtOAc (10 mL) and concentrated. The resultingoil was purified by column chromatography (40% EtOAc/hexane) affording830 mg (59%) ofbenzyl-[8-(4-benzyl-piperazin-1-yl)-quinolin-6-yl]-methyamine as anorange foam.

To a solution ofbenzyl-[8-(4-benzyl-piperazin-1-yl)-quinolin-6-yl]-methyamine (800 mg,1.89 mmol) in anhydrous CH₂Cl₂ (100 mL) was added vinyl chloroformate(0.48 mL, 5.68 mmol) and heated at reflux overnight. A second aliquot ofvinyl chloroformate (0.48 mL) was added and the reaction refluxed anadditional 24 hours. The cooled reaction mixture was diluted with H₂O(50 mL) and extracted into CH₂Cl₂ (2×50 mL). The combined organic phaseswere dried over Na₂SO ₄, filtered and concentrated. The resulting oilwas purified by column chromatography (40% EtOAc/hexane) affording 600mg of a monodebenzylated product. This material was dissolved in EtOH(100 mL) and 10% Pd/C (150 mg) and ammonium formate (244 mg, 4.5 mmol)were added. The reaction was heated at reflux overnight. Additionalammonium formate (250 mg) was added and the reaction refluxed for anadditional 72 hours. The cooled reaction mixture was filtered through apad of celite and washed with EtOAc (200 mL), concentrated and purifiedby column chromatography (10% MeOH/CH₂Cl₂) affording 400 mg of the titlecompound as a dark gold oil. An analytical sample was prepared as theHCl salt from EtOAc as an orange solid: mp decomposes above 85° C. MS(+) APCI m/z 315 [M+H].

INTERMEDIATE 59 4-Methoxy-2,6-dinitro-phenylamine

To a stirred solution of HNO₃ (65 mL) was added4-methoxy-2-nitro-phenylamine (15 g, 89.3 mmol). The reaction mixturewas stirred at room temperature overnight. The dark red precipitate wasfiltered and washed with H₂O (400 mL) affording 10.01 g (53%) of thetitle compound.

INTERMEDIATE 60 7-Methoxy-quinoxalin-5-ylamine

A solution of 4-methoxy-2,6-dinitro-phenylamine (5 g, 23.5 mmol) in EtOH(200 mL) was hydrogenated over 10% Pd/C (2 g) at 40 psi for 1 hour.After H₂ uptake had ceased, the reaction was filtered through a pad ofcelite and washed with EtOAc (50 mL) and concentrated. Glyoxal (8 ml,704 mmol) and EtOH (50 mL) were immediately added and the reaction washeated at reflux for 2 hours. The cooled reaction was diluted with H₂O(50 mL) and extracted into CH₂Cl₂ (3×100 mL). The organic phases werecombined, dried over Na₂SO₄, filtered and concentrated. The resultingoil was purified by column chromatography (10% MeOH/CH₂Cl₂) affording430 mg (10%) as a red oil. An analytical sample was prepared as the HClsalt from EtOAc affording a red solid.

INTERMEDIATE 61 (1-Oxy-pyridin-3-yl)-acetonitrile

A solution of 3-pyridylacetonitrile (11 g, 93.1 mmol), HOAc (55 mL), and30% H₂O₂ (17 mL) was heated at 95° C. overnight, and at room temperaturefor 72 hours. H₂O (50 mL) was added to the reaction mixture and theresulting solution was concentrated. This was repeated with additionalH₂O (100 mL). Toluene (2×100 mL) was used to remove residual H₂O, andthe resulting white solid was dried under vacuum overnight affording awaxy white solid: mp 120-125° C.; MS (+) APCI m/z 135 [M+H]⁺.

Ref: JACS 1959, 81 p. 740-743.

INTERMEDIATE 62 3-Cyanomethyl-pyridine-2-carbonitrile

To a suspension of (1-oxy-pyridin-3-yl)-acetonitrile (10 g, 75 mmol) inanhydrous CH₂Cl₂ under a nitrogen atmosphere was addedtrimethylsilylcyanide (10.95 mL, 82 mmol) and dimethylcarbamoylchloride(7.55 mL, 82 mmol). The reaction mixture was stirred at room temperaturefor 72 hours and then concentrated. EtOAc (100 mL) was added to theresidue and the organic phase was washed with 1 M NaOH (150 mL), driedover Na₂SO₄, filtered and concentrated. The resulting solid was purifiedby column chromatography (50% EtOAc/hexanes) affording 7.08 g (66%) of ayellow solid: mp 48-51° C.; MS (+) APCI m/z 144 [M+H]⁺.

Ref: WO 9818796.

INTERMEDIATE 63 6-Methoxy-[1,7]naphthyridin-8-ylamine

To an oven-dried 250 mL flask under a nitrogen atmosphere was addedanhydrous MeOH (200 mL). Na metal (1.07 g, 44 mmol) was weighed to asmall beaker containing hexane and then transferred to the reactionvessel. After dissolution of the sodium,3-cyanomethyl-pyridine-2-carbonitrile (5.3 g, 37 mmol) dissolved inanhydrous MeOH (10 mL) was added to the reaction. The resulting solutionwas heated at 80° C. for 3 hours, then stirred at room temperatureovernight. The reaction mixture was concentrated to remove MeOH andextracted into CH₂Cl₂ (2×200 mL). The organic phases were combined,dried over Na₂SO₄, filtered, concentrated and unsuccessfullychromatographed (2% MeOH/CH₂Cl₂). The mixed fractions were combined andrecrystalized from EtOAc/hexane affording 1.16 g (18%) of the titlecompound as a yellow solid. The mother liquor was rechromatographed (50%EtOAc/hexanes) to afford an additional 560 mg (9%) of product: mpdecomposes above 110° C.; MS (+) APCI m/z 176 [M+H]⁺.

Ref: Tet. Lett. 1975 p. 173-174.

INTERMEDIATE 64 6-Methoxy-8-piperazin-1-yl-[1,7]naphthyridine

A solution of 6-methoxy-[1,7]naphthyridin-8-ylamine (2.25 g, 12.8 mmol),bis(2-chloroethyl)-benzlyamine (10.25 g, 38.6 mmol) and Et₃N (5.34 mL,38.6 mmol) in BuOH (100 mL) was heated at 100° C. for 72 hours. Thecooled reaction mixture was poured into H₂O (100 mL) and 2.5 N NaOH (100mL), and extracted into EtOAc (2×200 mL). The organic phases werecombined, dried over Na₂SO₄, filtered and concentrated. The resultingoil was purified twice by column chromatography (10% MeOH/CH₂Cl₂)affording a dark gold oil with BuOH impurity. This oil was dissolved inEtOH (50 mL) and 10% Pd/C (390 mg) and ammonium formate (730 mg) wasadded. The reaction mixture was heated at 80° C. for 2.5 hours. Thecooled reaction mixture was filtered through a pad of celite and washedwith EtOAc (50 mL). The organic phase was concentrated and purified bycolumn chromatography (10% MeOH/CH₂Cl₂+NH₄OH) affording 270 mg of thetitle compound as a dark orange oil. An analytical sample was preparedas the HCl salt from EtOAc.

INTERMEDIATE 65 4-Piperazin-1-yl-1,3-dihydro-benzoimidazol-2-one

To a solution of4-(4-benzylpiperazin-1-yl)-1,3-dihydro-benzoimidazol-2-one (1 g, 3.2mmol) in anhydrous CH₂Cl₂ (50 mL) was added vinyl chloroformate (0.41mL, 4.87 mmol) under a nitrogen atmosphere. The reaction mixture washeated at reflux for 2 hours, and then a second aliquot of vinylchloroformate (0.41 mL) was added. The reaction was refluxed anadditional 3 hours. The cooled reaction mixture was concentrated, anddioxan (25 mL) and conc. HCl (25 mL) were added to the residue. Theresulting solution was stirred at room temperature for 72 hours. Thereaction was basicified with 2.5 N NaOH (300 mL) and extracted inMeOH/EtOAc (2×200 mL). The organic fractions were combined, dried overNa₂SO₄ and concentrated and the resulting oil purified by columnchromatography affording 393 mg (46%) as the oxalate salt. MS (+) ESIm/z 219 [M+H]⁺.

INTERMEDIATE 66 6-Methoxy-1H-indol-4-ylamine

To a solution of 5-methoxy-2-methyl-1,3-dinitrobenzene¹ (3.28 g, 15mmol) in 15 mL dry N,N-dimethylformamide was added N,N-dimethyformamidedimethyl acetal (6.16 mL, 45 mmol) and pyrrolidine (1.3 mL, 15 mmol).The reaction mixture was heated at 120° C. until TLC analysis showedcomplete consumption of the 5-methoxy-2-methyl-1,3-dinitrobenzene.N,N-Dimethylformamide was removed under the vacuum, affording a dark redmaterial, which was dissolved in dry benzene and hydrogenated at 50 psiwith 10% Pd/C (0.1 g) for 4 hours. The catalyst was filtered off and thesolvent removed under vacuum. Chromatography (25% ethyl acetate/hexane)afforded 1.0 g (40%) of the desired product as a yellow solid: mp 83-86°C.; MS EI m/e 162.

INTERMEDIATE 67 4-(4-Benzyl-piperazin-1-yl)-6-methoxy-1H-indole

A solution of 6-methoxy-1H-indol-4-ylamine (0.76 g, 4.7 mmol) andbis(2-chloroethyl)-benzylamine (2.72 g, 11.7 mmol) in 1-butanol (20 mL)was stirred at 100° C. for 18 hours then poured into aqueous sodiumcarbonate solution. The mixture was extracted with ethyl acetate (3×60mL). The organic layer was dried over anhydrous sodium sulfate andfiltered. The solvent was removed under vacuum. Chromatography (30%ethyl acetate/hexane) afforded 0.60 (40%) of product as a gray oil. MS(+) APCI (M+H)⁺ m/e 322.

INTERMEDIATE 68 6-Methoxy-4-piperazin-1-yl-1H-indole

A mixture of 4-(4-benzyl-piperazin-1-yl)-6-methoxy-1H-indole (0.37 g,1.1 mmol), 10% Pd/C (0.05 g) and ammonium formate (0.15 g, 2.2 mmol) inethanol (20 mL) was allowed to reflux for 2 hours. The catalyst wasfiltered off and the solvent removed under vacuum. Chromatography (10%methanol/methylene chloride plus ammonium hydroxide) afforded 0.2 g(75%) of product as a yellow foam. MS (EI) m/e 231.

EXAMPLE 1a3-[cis-4-[4-(1H-Indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

A solution of 4-(1H-indol-3-yl)-cyclohexanone (0.53 g, 2.5 mmol),1-(indol-4-yl)piperazine (0.5 g, 2.5 mmol), sodium triacetoxyborohydride(0.78 g, 3.5 mmol) and acetic acid (0.14 ml, 2.5 mmol) in1,2-dichloroethane (11 ml) was allowed to stir at room temperatureovernight. The reaction was quenched with 1N sodium hydroxide (10 ml),extracted with methylene chloride (3×60 ml), and washed with brine (3×60ml). The organic layer was dried over anhydrous sodium sulfate andfiltered. Chromatography (10% methanol-ethyl acetate) afforded 0.52 g(53%) of product as a white solid: mp 85-87° C.

The HCl salt was prepared in ethyl acetate: mp 198-200° C. Elementalanalysis for C₂₆H₃₀N₄.HCl; Calc'd: C, 68.25; H, 7.38; N, 12.25; Found:C, 68.12; H, 7.16; N, 11.93.

EXAMPLE 1b3-[trans-4-[4-(1H-Indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

The trans compound was isolated at the same time as the cis isomer in21% yield (0.21 g) as a white solid: mp 105-107° C.

The HCl salt was prepared in ethyl acetate: mp 305° C. (decomposed).Elemental analysis for C₂₆H₃₀N₄.HCl; Calc'd: C, 68.25; H, 7.38; N,12.25; Found: C, 68.12; H, 7.16; N, 11.93.

EXAMPLE 2a4-Fluoro-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

A solution of 4-(4-fluoro-1H-indol-3-yl)-cyclohexanone (0.88 g, 3.8mmol), 1-(indol-4yl)piperazine (0.7 g, 3.5 mmol), sodiumtriacetoxyborohydride (1.1 g, 5.2 mmol) and acetic acid (0.4 ml, 7 mmol)in 1,2-dichloroethane (20 ml) was allowed to stir at room temperatureovernight. The reaction was quenched with 1N sodium hydroxide (10 ml),extracted with methylene chloride (3×60 ml), and washed with brine (3×60ml). The organic layer was dried over anhydrous sodium sulfate andfiltered. Chromatography (5-7% methanol-ethyl acetate) afforded 1.14 g(79%) of product as a white foam.

The HCl salt was prepared in ethanol: mp 283-285° C. Elemental analysisfor C₂₆H₂₉FN₄.HCl.0.25H₂O; Calc'd: C, 68.26; H, 6.72; N, 12.25; Found:C, 68.16; H, 6.74; N, 12.04.

EXAMPLE 2b4-Fluoro-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

The trans compound was isolated at the same time as the cis isomer in17% yield (0.24 g) as a white solid: mp 206-208° C.

The HCl salt was prepared in ethanol: mp 297-299° C. Elemental analysisfor C₂₆H₉FN₄.HCl.H₂O; Calc'd: C, 66.30; H, 6.85; N, 11.90; Found: C,66.17; H, 6.51; N, 11.70.

EXAMPLE 3a5-Fluoro-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

This compound was prepared in the manner described above for Example 2by replacing 4-(4-fluoro-1H-indol-3-yl)-cyclohexanone with4-(5-fluoro-1H-indol-3-yl)-cyclohexanone (0.56 g, 2.5 mmol) to afford0.54 g (52%) of product as a white solid: mp 108-110° C.

The HCl salt was prepared in ethyl acetate: mp 215-217° C. Elementalanalysis for C₂₆H₂₉FN₄.HCl.0.36C₄H₂O₂; Calc'd: C, 67.37; H, 6.88; N,11.45; Found: C, 67.18; H, 6.72; N, 11.18.

EXAMPLE 3b5-Fluoro-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

The trans compound was isolated at the same time as the cis isomer in30% yield (0.31 g) as a white solid: mp 112-114° C.

The HCl salt was prepared in ethanol: mp 280° C. (decomposed). Elementalanalysis for C₂₆H₂₉FN₄.HCl; Calc'd: C, 66.81; H, 6.81; N, 11.99; Found:C, 66.44; H, 6.66; N, 11.74.

EXAMPLE 4a6-Fluoro-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

This compound prepared in the manner described above for Example 2 byreplacing was 4-(4-fluoro-1H-indol-3-yl)-cyclohexanone with4-(6-fluoro-1H-indol-3-yl)-cyclohexanone (1.15 g, 5.0 mmol) to afford1.06 g (51%) of product as a white foam.

The HCl salt was prepared in ethanol: mp 250-252° C. (decomposed).Elemental analysis for C₂₆H₂₉FN₄.HCl; Calc'd: C, 67.37; H, 6.88; N,11.45; Found: C, 67.18; H, 6.72; N, 11.18.

EXAMPLE 4b6-Fluoro-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

The trans compound was isolated at the same time as the cis isomer in27% yield (0.55 g) as a white foam.

The HCl salt was prepared in ethanol: mp 319-320° C. (decomposed).Elemental analysis for C₂₆H₂₉FN₄.HCl; Calc'd: C, 66.81; H, 6.81; N,11.99; Found: C, 66.44; H, 6.66; N, 11.74.

EXAMPLE 5a5-Bromo-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

This compound was prepared in the manner described above for Example 2by replacing 4-(4-fluoro-1H-indol-3-yl)-cyclohexanone with4-(5-bromo-1H-indol-3-yl)-cyclohexanone (0.75 g, 2.5 mmol) to afford0.81 g (68%) of product.

The HCl salt was prepared in ethyl acetate: mp 276° C. Elementalanalysis for C₂₆H₂₉BrN₄.HCl; Calc'd: C, 60.23; H, 5.93; N, 10.81; Found:C, 59.95; H, 5.83; N, 10.64.

EXAMPLE 5b5-Bromo-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

The trans compound was isolated at the same time as the cis isomer in24% yield (0.29 g).

The HCl salt was prepared in ethyl acetate: mp>300° C. Elementalanalysis for C₂₆H₂₉BrN₄.HCl; Calc'd: C, 60.75; H, 5.88; N, 10.90; Found:C, 60.38; H, 5.89; N, 10.61.

EXAMPLE 6a5-Chloro-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

A solution of 4-(5-chloro-1H-indol-3-yl)-cyclohexanone (0.78 g, 3.1mmol), 1-(indol-4-yl)piperazine (0.6 g, 3 mmol), sodiumtriacetoxyborohydride (0.95 g, 4.5 mmol) and acetic acid (0.34 ml, 6mmol) in 1,2-dichloroethane (20 ml) was allowed to stir at roomtemperature overnight. The reaction was quenched with 1N sodiumhydroxide (10 ml), extracted with methylene chloride (3×60 ml) andwashed with 10 brine (3×60 ml). The organic layer was dried overanhydrous sodium sulfate and filtered. Chromatography (5% methanol-ethylacetate) afforded 0.84 g (65%) of product as a white foam.

The HCl salt was prepared in ethanol: mp 283-285° C. Elemental analysisfor C₂₆H₂₉ClN₄.HCl.0.25H₂O; Calc'd: C, 65.46; H, 6.69; N, 11.45; Found:C, 65.14; H, 6.73; N, 11.33.

EXAMPLE 6b5-Chloro-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

The trans compound was isolated at the same time as the cis isomer in24% yield (0.32 g) as a white foam.

The HCl salt was prepared in ethanol: mp 314-315.5° C. Elementalanalysis for C₂₆H₂₉ClN₄.HCl.0.25H₂O; Calc'd: C, 65.65; H, 6.60; N,11.62; Found: C, 65.50; H, 6.50; N, 11.30.

EXAMPLE 7a3-{4-[(1,4-cis)-4-(1H-Indol-4-yl)-piperazinyl-1-yl]cyclohexyl}-1H-indole-5-carbonitrile

This compound was prepared in the manner described above for Example 2by replacing 4-(4-fluoro-1H-indol-3-yl)-cyclohexanone with4-(5-cyano-1H-indol-3-yl)-cyclohexanone (0.71 g, 3.0 mmol) to afford0.38 g (30%) of product.

The HCl salt was prepared in ethyl acetate: mp 216-218° C. Elementalanalysis for C₂₇H₂₉N₅.HCl.0.33C₄H₈O₂; Calc'd: C, 66.25; H, 6.94; N,13.64; Found: C, 66.05; H, 6.54; N, 13.28.

EXAMPLE 7b3-{4-[(1,4-trans)-4-(1H-Indol-4-yl)-piperazinyl-1-yl]cyclohexyl}-1H-indole-5-carbonitrile

The trans compound was isolated at the same time as the cis isomer in25% yield (0.32 g).

The HCl salt was prepared in ethyl acetate: mp>310° C. Elementalanalysis for C₂₇H₂₉N₅.HCl; Calc'd: C, 68.48; H, 6.71; N, 14.79; Found:C, 68.43; H, 6.54; N, 14.63.

EXAMPLE 8a5-Methoxy-3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

A solution of 4-(5-methoxy-1H-indol-3-yl)-cyclohexanone (1.2 g, 5 mmol),1-(indol-4-yl)piperazine (1 g, 5 mmol), sodium triacetoxyborohydride(1.47 g, 6.2 mmol) and acetic acid (0.28 ml, 4 mmol) in1,2-dichloroethane (20 ml) was allowed to stir at room temperatureovernight. The reaction was quenched with 1N sodium hydroxide (10 ml),extracted with methylene chloride (3×60 ml) and washed with brine (3×60ml). The organic layer was dried over anhydrous sodium sulfate andfiltered. Chromatography (2.5% methanol-ethyl acetate) afforded 1.18 g(55%) of product as a white solid: mp 105-108° C.

The HCl salt was prepared in ethyl acetate: mp 283-285° C. Elementalanalysis for C₂₇H₃₂N₄O.HCl.0.5H₂O; Calc'd: C, 68.55; H, 7.03; N, 11.85;Found: C, 68.86; H, 7.29; N, 11.76.

EXAMPLE 8b5-Methoxy-3-[trans-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole

The trans compound was isolated at the same time as the cis isomer in20% yield (0.43 g) as a white foam.

The HCl salt was prepared in ethyl acetate: mp 194-196° C. Elementalanalysis for C₂₇H₃₂N₄O.HCl.1.5H₂O; Calc'd: C, 66.65; H, 7.15; N, 11.52;Found: C, 66.65; H, 7.06; N, 11.44.

EXAMPLE 9a3-[cis-4-[4-(1H-Indol-4-yl)-1-piperazinyl]cyclohexyl]-2-methyl-1H-indole

A solution of 4-(1H-indol-3-yl)-cyclohexanone (1.44 g, 6.33 mmol),1-(indol-4-yl)piperazine (1.27 g, 6.33 mmol), sodiumtriacetoxyborohydride (1.88 g, 8.86 mmol) and acetic acid (0.76 mg, 12.6mmol) in 1,2-dichloroethane (100 ml) was allowed to stir at roomtemperature overnight. The reaction was quenched with 1N sodiumhydroxide (80 ml), extracted with methylene chloride (3×300 ml), andwashed with brine (150 ml). The organic layer was dried over anhydroussodium sulfate and filtered. The solvent was removed under vacuum toafford an off-white solid. Trituration of the solid with warm methylenechloride (80 ml) followed by filtration afforded 0.88 g of white solid.The mother liquor was concentrated and chromatographed (2%methanol-methylene chloride) to afford another 0.18 g (total yield40.7%) of product as a white solid: mp 279-280° C.

The HCl salt was prepared in ethanol: mp 200-203° C. Elemental analysisfor C₂₇H₃₂H₂N₄.2HCl; Calc'd: C, 64.99; H, 7.17; N, 11.23; Found: C,65.05; H, 7.07; N, 11.23.

EXAMPLE 9b3-[trans-4-[4-(1H-Indol-4-yl)-1-piperazinyl]cyclohexyl]-2-methyl-1H-indole

The trans compound was isolated at the same time as the cis isomer in25.7% yield (0.67 g) as a white foam.

The HCl salt was prepared in ethanol: mp>310° C. Elemental analysis forC₂₇H₃₂N₄.2HCl; Calc'd: C, 66.80; H, 7.06; N, 11.54; Found: C, 66.84; H,6.87; N, 11.37.

EXAMPLE 10a3-{(1,4-cis)-4-[4-(1H-Indole-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-pyrrolo[2,3-b]pyridine

This compound was prepared in the manner described above for Example 2by replacing 4-(5-fluoro-1H-indol-3-yl)-cyclohexanone with4-(1H-3-pyrrolo[2,3-b]pyridyl)-cyclohexanone (1.52 g, 7.1 mmol) in 27%(0.79 g) yield as a white solid.

The HCl salt was prepared in ethanol: mp>250° C. (dec.); Elementalanalysis for C₂₅H₂₉N₅.3HCl; Calc'd: C, 58.49; H, 6.38; N, 13.64; Found:C, 58.47; H, 6.52; N, 12.91.

EXAMPLE 10b3-{(1,4-trans)-4-[4-(1H-Indole-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-pyrrolo[2,3-b]pyridine

The trans compound was isolated at the same time as the cis isomer in 9%yield (0.26 g) as a white solid: mp>228° C.

The HCl salt was prepared in ethanol: mp>250° C. (dec.); Elementalanalysis for C₂₅H₂₉N₅.3HCl; Calc'd: C, 56.50; H, 6.54; N, 13.18; Found:C, 56.45; H, 6.63; N, 12.98.

EXAMPLE 116-Fluoro-1-methyl-3-{cis-4-[4-(1-methyl-1H-indol-4-yl)-1-piperazinyl]cyclohexyl}-1H-indole

To a solution of3-[cis-4-[4-(1H-indol-4-yl)-1-piperazinyl]cyclohexyl]-1H-indole (0.27 g,0.65 mmol) in anhydrous N,N-dimethylformamide (4 ml) was added 60%sodium hydride (33.7 mg, 0.84 mmol) at room temperature. The mixture wasallowed to stir for 30 minutes at room temperature, then iodomethane wasadded to the above solution. The resulting mixture was stirred foranother 0.5 hour and then poured into water (80 ml) and extracted withethyl acetate (2×80 ml). The organic layer was dried over anhydrousmagnesium sulfate and filtered. Chromatography (20% acetone-hexanes)afforded 0.93 g (55%) of product as an oil which was heated in ethanolto afford a white solid: mp 188-190° C.

The HCl salt was prepared in ethanol: mp 253-254° C. Elemental analysisfor C₂₈H₃₃N₄F.HCl.0.5H₂O; Calc'd: C, 68.62; H, 7.20; N, 11.43; Found: C,68.98; H, 6.80; N, 11.47.

EXAMPLE 12a3-{(1,4-cis)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

A solution of 4-(5-cyano-1-methyl-3-indolyl)-cyclohexanone (0.75 g, 3mmol), 1-(indol-4-yl)piperazine (0.6 g, 3 mmol), sodiumtriacetoxyborohydride (0.95 g, 4.5 mmol) and acetic acid (0.34 ml, 6mmol) in 1,2-dichloroethane (20 ml) was allowed to stir at roomtemperature overnight. The reaction was quenched with 1N sodiumhydroxide (10 ml), extracted with methylene chloride (3×60 ml) andwashed with brine (3×60 ml). The organic layer was dried over anhydroussodium sulfate and filtered. Chromatography (10% methanol-ethyl acetate)afforded 0.73 g (56%) of product as a white solid: mp 274-275° C.

The HCl salt was prepared in ethyl acetate: mp 285.5-288° C. Elementalanalysis for C₂₈H₃₁N₅.2HCl.H₂O; Calc'd: C, 68.35; H, 6.97; N, 14.23;Found: C, 68.51; H, 6.65; N, 14.06.

EXAMPLE 12b3-{(1,4-trans)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans compound was isolated at the same time as the cis isomer in33% yield (0.42 g) as a white solid: mp 239-240° C.

The HCl salt was prepared in ethyl acetate: mp 286-288° C. Elementalanalysis for C₂₈H₃₁N₅.2HCl.0.5H₂O; Calc'd: C, 64.73; H, 6.60; N, 13.65;Found: C, 64.55; H, 6.42; N, 13.41.

EXAMPLE 13a1-Ethyl-3-{(1,4-cis)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

A solution of 4-(5-cyano-1-ethyl-indol-3-yl)-cyclohexanone (1.5 g, 5.6mmol), 1-(indol-4-yl)piperazine (1.19 g, 5.9 mmol), sodiumtriacetoxyborohydride (1.73 g, 8.2 mmol) and acetic acid (0.9 ml, 15mmol) in 1,2-dichloroethane (30 ml) was allowed to stir at roomtemperature overnight. The reaction was quenched with 1N sodiumhydroxide (10 ml), extracted with methylene chloride (3×80 ml), andwashed with brine (3×80 ml). The organic layer was dried over anhydroussodium sulfate and filtered. Chromatography (2.5% methanol-ethylacetate) afforded 0.98 g (39%) of product as a white solid: mp 226° C.(dec.).

The HCl salt was prepared in ethyl acetate: mp 245° C. Elementalanalysis for C₂₉H₃₃N₅.2HCl.0.25H₂O; Calc'd: C, 65.84; H, 6.76; N, 13.24;Found: C, 65.97; H, 6.74; N, 13.40.

EXAMPLE 13b1-Ethyl-3-{(1,4-trans)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

The trans compound was isolated at the same time as the cis isomer in19% yield (0.48 g) as a light brown solid: mp decomposed at 110° C.

The HCl salt was prepared in ethyl acetate: mp 250° C. (decomposed).Elemental analysis for C₂₉H₃₃N₅.2HCl; Calc'd: C, 66.40; H, 6.73; N,13.35; Found: C, 66.32; H, 6.67; N, 13.10.

EXAMPLE 14a3-{(1,4-cis)-4-[4-(1H-Indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1-propyl-1H-indole-5-carbonitrile

A solution of 4-(5-cyano-1-n-propyl-indol-3-yl)-cyclohexanone (1.68 g, 6mmol), 1-(indol-4-yl)piperazine (1.27 g, 6.3 mmol), sodiumtriacetoxyborohydride (1.84 g, 8.9 mmol) and acetic acid (0.94 ml, 16mmol) in 1,2-dichloroethane (80 ml) was allowed to stir at roomtemperature overnight. The reaction was quenched with 1N sodiumhydroxide (20 ml), extracted with methylene chloride (3×100 ml) andwashed with brine (3×100 ml). The organic layer was dried over anhydroussodium sulfate and filtered. Chromatography (10% methanol-ethyl acetate)afforded 0.42 g (15%) of product as a white powder.

The HCl salt was prepared in ethanol: mp 200-206° C. Elemental analysisfor C₃₀H₃₅N₅.2HCl.0.75H₂O; Calc'd: C, 65.27; H, 7.03; N, 12.69; Found:C, 65.18; H, 6.97; N, 12.68.

EXAMPLE 14b3-{(1,4-trans)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1-propyl-1H-indole-5-carbonitrile

The trans compound was isolated at the same time as the cis isomer in14% yield (0.39 g) as a white foam.

The HCl salt was prepared in ethanol: mp decomposed>245° C. Elementalanalysis for C₃₀H₃₅N₅.2HCl; Calc'd: C, 66.90; H, 6.93; N, 13.00; Found:C, 66.68; H, 6.97; N, 12.96.

EXAMPLE 15a3-{(1,4-cis)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1-isopropyl-1H-indole-5-carbonitrile

A solution of 4-(5-cyano-1-n-propyl-indol-3-yl)-cyclohexanone (1.68 g, 6mmol), 1-(indol-4-yl)piperazine (1.27 g, 6.3 mmol), sodiumtriacetoxyborohydride (1.84 g, 8.9 mmol) and acetic acid (0.94 ml, 16mmol) in 1,2-dichloroethane (80 ml) was allowed to stir at roomtemperature overnight. The reaction was quenched with 1N sodiumhydroxide (20 ml), extracted with methylene chloride (3×100 ml), andwashed with brine (3×100 ml). The organic layer was dried over anhydroussodium sulfate, and filtered. Chromatography (10% methanol-ethylacetate) afforded 0.49 g (18%) of product as a white powder.

The HCl salt was prepared in ethanol: mp 285-286° C. Elemental analysisfor C₃₀H₃₅N₅.HCl0.5H₂O; Calc'd: C, 70.50; H, 7.30; N, 13.70; Found: C,70.65; H, 7.16; N, 13.45.

EXAMPLE 15b3-{(1,4-trans)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1-isopropyl-1H-indole-5-carbonitrile

The trans compound was isolated at the same time as the cis isomer in12% yield (0.34 g) as a white foam.

The HCl salt was prepared in ethanol: mp decomposed>245° C. Elementalanalysis for C₃₀H₃₅N₅.HCl; Calc'd: C, 66.90; H, 6.93; N, 13.00; Found:C, 66.68; H, 6.97; N, 12.96.

EXAMPLE 16a1-Benzyl-3-{(1,4-cis)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

A solution of 4-(5-cyano-1-benzyl-indol-3-yl)-cyclohexanone (2.97 g, 9mmol), 1-(indol-4-yl)piperazine (1.94 g, 9.6 mmol), sodiumtriacetoxyborohydride (2.7 g, 13 mmol) and acetic acid (1 ml, 24 mmol)in 1,2-dichloroethane (50 ml) was allowed to stir at room temperatureovernight. The reaction was quenched with 1N sodium hydroxide (20 ml),extracted with methylene chloride (3×100 ml) and washed with brine(3×100 ml). The organic layer was dried over anhydrous sodium sulfateand filtered. Chromatography (25-50% ethyl acetate-hexanes) afforded1.71 g (37%) of product as a white powder.

The HCl salt was prepared in ethanol: mp dec.>245° C. Elemental analysisfor C₃₄H₃₅N₅.HCl.0.5H₂O; Calc'd: C, 68.56; H, 6.43; N, 11.76; Found: C,68.93; H, 6.55; N, 11.52.

EXAMPLE 16b1-Benzyl-3-{(1,4-trans)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

The trans compound was isolated at the same time as the cis isomer in15% yield (0.68 g) as a white foam.

The HCl salt was prepared in ethanol: mp>240° C. (dec.). Elementalanalysis for C₃₄H₃₅N₅.2HCl.0.25H₂O; Calc'd: C, 69.08; H, 6.40; N, 11.85;Found: C, 69.09; H, 6.17; N, 11.80.

EXAMPLE 171-Methyl-3-{(1,4-cis)-4-[4-(1-methyl-1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

To a suspension of sodium hydride (60%, 95 mg, 2.4 mmol) in anhydrousN,N-dimethylformamide was added a solution3-{(1,4-cis)-4-[4-(1H-indol-4-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile(0.52 g, 1.2 mmol) in 10 ml N,N-dimethylformide. The mixture was allowedto stir at room temperature for 30 minutes. Then iodomethane (0.17 g,2.4 mmol) was added to the above reaction mixture. The mixture wasallowed to stir at room temperature for another 30 minutes, thenquenched with ice-water. The mixture was extracted with methylenechloride (150 ml), and dried over anhydrous sodium sulfate.Chromatography (methanol-methylene chloride-ethyl acetate; 1:1:8)afforded 0.53 g (99%) of product as a pink foam.

The HCl salt was prepared in ethanol: mp 252-255° C. Elemental analysisfor C₂₉H₃₃N₅.2HCl; Calc'd: C, 66.40; H, 6.73; N, 13.35; Found: C, 66.64;H, 6.82; N, 13.21.

EXAMPLE 185-Fluoro-3-{(cis)-4-[4-(2-methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1H-indole

A solution of 4-(5-fluoro-1-indol-3-yl)-cyclohexanone (0.35 g, 1.5mmol), 1-(2-methoxy-phenyl)piperazine (0.29 g, 1.5 mmol), sodiumtriacetoxyborohydride (0.47 g, 2.1 mmol) and acetic acid (0.05 ml, 1.5mmol) in 1,2-dichloroethane (8 ml) was allowed to stir at roomtemperature for 12 hours. The reaction was quenched with 1N sodiumhydroxide (pH>9) and extracted with methylene chloride (3×50 ml). Theorganic layer was dried over anhydrous sodium sulfate and filtered.Chromatography (10% methanol-ethyl acetate) afforded 0.34 g (56%) ofproduct as a white solid.

The HCl salt was prepared in ethyl acetate: mp 170-172° C. Elementalanalysis for C₂₅H₃₀FN₃O.HCl; Calc'd: C, 66.95; H, 7.08; N, 9.37; Found:C, 66.93; H, 7.08; N, 9.29.

EXAMPLE 19a5-Fluoro-3-{(1,4-cis)-4-[4-(2-methoxy-phenyl)-piperidin-1-yl]-cyclohexyl}-1H-indole

This compound was prepared in the manner described above for Example 18by replacing 1-(2-methoxy-phenyl)piperazine with1-(2-methoxy-phenyl)piperidine (1.0 g, 5.2 mmol) to afford 1.34 g ofproduct in 63% yield.

The HCl salt was prepared in ethyl acetate: mp 245-250° C. Elementalanalysis for C₂₆H₃₁FN₂O.HCl.0.09C₄H₈O₂; Calc'd: C, 69.09; H, 7.36; N,6.20; Found: C, 66.19; H, 7.18; N, 6.08.

EXAMPLE 19b5-Fluoro-3-{(1,4-trans)-4-[4-(2-methoxy-phenyl)-piperidin-1-yl]-cyclohexyl}-1H-indole

The trans compound was isolated at the same time as the cis isomer in20% yield (0.43 g).

The HCl salt was prepared in ethyl acetate: mp 297-299° C. Elementalanalysis for C₂₆H₃₁FN₂O.HCl.0.08C₄H₈O₂; Calc'd: C, 70.49; H, 7.28; N,6.32; Found: C, 70.17; H, 7.30; N, 6.10.

EXAMPLE 20a5-Methoxy-3-{(1,4-cis)-4-[4-(2-methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1H-indole

This compound was prepared in the manner described above for Example 18by replacing 4-(5-fluoro-1-indol-3-yl)-cyclohexanone with4-(5-methoxy-1-indol-3-yl)-cyclohexanone (1.2 g, 5 mmol) to afford 1.18g (55%) of the title compound as a white solid: mp 105-108° C.

The HCl salt was prepared in ethyl acetate: mp 198-199° C. Elementalanalysis for C₂₆H₃₃N₃O₂.HCl; Calc'd: C, 68.48; H, 7.52; N, 9.21; Found:C, 68.31; H, 7.54; N, 9.08.

EXAMPLE 20b5-Methoxy-3-{(1,4-trans)-4-[4-(2-methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1H-indole

The trans compound was isolated at the same time as the cis isomer in20% yield (0.43 g) as a white foam.

The HCl salt was prepared in ethyl acetate: mp 195-197° C. Elementalanalysis for C₂₆H₃₃N₃O₂.HCl; Calc'd: C, 68.48; H, 7.52; N, 9.21; Found:C, 68.18; H, 7.50; N, 9.11.

EXAMPLE 213-{(1,4-cis)-4-[4-(2-Methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1H-pyrrolo[2,3-b]pyridine

This compound was prepared in the manner described above for Example 18by replacing 4-(5-fluoro-1H-indol-3-yl)-cyclohexanone with4-(1H-pyrrolo[2,3-b]-3-pyridyl)-cyclohexanone (1.71 g, 7.9 mmol) in 42%yield (1.34 g) as a white solid: mp 170-172° C.

The HCl salt was prepared in ethanol: mp 259-261° C. Elemental analysisfor C₂₄H₃₀ON₄.HCl; Calc'd: C, 65.44; H, 7.44; N, 12.72; Found: C, 65.60;H, 7.36; N, 12.22.

EXAMPLE 22a5-Fluoro-3-{(cis)-4-[4-(5-fluoro-2-methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1H-indole

A solution of 4-(5-fluoro-1-indol-3-yl)-cyclohexanone (1.1 g, 4.8 mmol),1-(2-methoxy-5-fluoro-phenyl)piperazine (1.0 g, 4.8 mmol), sodiumtriacetoxyborohydride (1.5 g, 7.1 mmol) and acetic acid (0.27 ml, 4.7mmol) in 1,2-dichloroethane (20 ml) was allowed to stir at roomtemperature for 12 hours. The reaction was quenched with 1N sodiumhydroxide (pH>9), extracted with methylene chloride (3×50 ml). Theorganic layer was dried over anhydrous sodium sulfate and filtered.Chromatography (10% methanol-ethyl acetate) afforded 1.16 g (53%) ofproduct as a white solid: mp 152-153° C.

The HCl salt was prepared in ethyl acetate: mp 171-174° C. Elementalanalysis for C₂₅H₂₉F₂N₃O₂.HCl; Calc'd: C, 59.17; H, 6.36; N, 8.28;Found: C, 59.20; H, 6.33; N, 8.09.

EXAMPLE 22b5-Fluoro-3-{(trans)-4-[4-(5-fluoro-2-methoxy-phenyl)-piperazin-1-yl]-cyclohexyl}-1H-indole

The trans compound was isolated at same time as the cis isomer in 12%yield (0.25 g) as a white solid: mp 64-67° C.

The HCl salt was prepared in ethyl acetate: mp 272-273.5° C. Elementalanalysis for C₂₅H₂₉F₂ON₃.HCl; Calc'd: C, 63.75; H, 6.64; N, 8.92; Found:C, 63.77, H, 6.41; N, 8.75.

EXAMPLE 23a3-{(1,4-cis)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-4-fluoro-1H-indole

A solution of 4-(4-fluoro-1-indol-3-yl)-cyclohexanone (0.71 g, 3.1mmol), 5-(1-piperazinyl)benzodioxan (0.77 g, 3.5 mmol), sodiumtriacetoxyborohydride (0.98 g, 4.6 mmol) and acetic acid (0.28 g, 4.6mmol) in 1,2-dichloroethane (70 ml) was allowed to stir at roomtemperature for 12 hours. The reaction was quenched with 1N sodiumhydroxide (100 ml), extracted with methylene chloride (3×100 ml). Theorganic layer was dried over anhydrous magnesium sulfate and filtered.Chromatography (1% methanol-ethyl acetate) afforded 0.8 g (53%) ofproduct as a white foam which was dissolved in warm ethanol (15 ml) andcrystallized to afford a white solid: mp 194-195.5° C.

The HCl salt was prepared in ethanol: mp 215-220° C. Elemental analysisfor C₂₆H₃₀FN₃O₂.HCl; Calc'd: C, 61.42; H, 6.34; N, 8.62; Found: C,61.15; H, 6.29; N, 8.04.

EXAMPLE 23b3-{(1,4-trans)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-4-fluoro-1H-indole

The trans compound was isolated at the same time as the cis isomer in14% yield (0.21 g) as a white foam which was recrystallization inethanol to afford a white solid: mp 188-190° C.

Elemental analysis for C₂₆H₃₀OF₂N₃; Calc'd: C, 71.70; H, 6.94; N, 9.65;Found: C, 71.33, H, 7.03; N, 9.55.

EXAMPLE 24a3-{(1,4-cis)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-5-fluoro-1H-indole

A solution of 4-(5-fluoro-1-indol-3-yl)-cyclohexanone (1.06 g, 4.6mmol), 5-(1-piperazinyl)benzodioxan (1.14 g, 5.2 mmol), sodiumtriacetoxyborohydride (1.46 g, 6.9 mmol) and acetic acid (0.41 g, 6.9mmol) in 1,2-dichloroethane (80 ml) was allowed to stir at roomtemperature for 12 hours. The reaction was quenched with saturatedsodium bicarbonate (100 ml), extracted with methylene chloride (3×100ml). The organic layer was dried over anhydrous magnesium sulfate andfiltered. Chromatography (1% methanol-ethyl acetate) afforded 1.06 g(53%) of product as an oil which solidified to afford a white solid: mp104-106° C.

The HCl salt was prepared in ethanol: mp 222-225° C. Elemental analysisfor C₂₆H₃₀FN₃O₂.2HCl.0.2H₂O; Calc'd: C, 60.88; H, 6.39; N, 8.19; Found:C, 60.85; H, 6.03; N, 8.13.

EXAMPLE 24b3-{(1,4-trans)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-5-fluoro-1H-indole

The trans compound was isolated at the same time as the cis isomer in27% yield (0.53 g) as a white solid: mp 206-210° C.

The HCl salt was prepared in ethanol: mp 295-297° C. Elemental analysisfor C₂₆H₃₀FO₂N₃.2HCl; Calc'd: C, 61.42; H, 6.34; N, 8.26; Found: C,61.22; H, 6.19; N, 8.13.

EXAMPLE 25a3-{(1,4-cis)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-6-fluoro-1H-indole

A solution of 4-(5-fluoro-1-indol-3-yl)-cyclohexanone (0.77 g, 3.0mmol), 5-(1-piperazinyl)benzodioxan (0.78 g, 3.0 mmol), sodiumcyanoborohydride (0.2 g, 3.0 mmol) in methanol (100 ml) was allowed tostir at room temperature for 48 h. The reaction was quenched withpotassium hydroxide (0.4 g). The methanol was removed under vacuum, theresidue was extracted with ethyl acetate (3×100 ml) and washed withwater. The organic layer was dried over anhydrous magnesium sulfate andfiltered. Chromatography (1% methanol-ethyl acetate) afforded 0.24 g(18%) of product as a yellow solid.

The HCl salt was prepared in ethanol: mp 228-230° C. Elemental analysisfor C₂₆H₃₀FN₃O₂.2HCl.0.6C₂H₆O; Calc'd: C, 61.37; H, 6.38; N, 8.22;Found: C, 61.19; H, 6.32; N, 8.29.

EXAMPLE 25b3-{(1,4-trans)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-6-fluoro-1H-indole

The trans compound was isolated at the same time as the cis isomer in 8%yield (0.11 g) as an oil.

The HCl salt was prepared in ethanol: mp 309-310° C. Elemental analysisfor C₂₆H₃₀FO₂N₃.2HCl.0.08C₄H₈O₂; Calc'd: C, 61.42; H, 6.34; N, 8.26;Found: C, 61.22; H, 6.19; N, 8.13.

EXAMPLE 26a3-{(1,4-cis)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

A solution of 4-(5-cyano-1-indol-3-yl)-cyclohexanone (0.60 g, 2.5 mmol),5-(1-piperazinyl)benzodioxane (0.55 g, 2.5 mmol), sodiumtriacetoxyborohydride (0.78 g, 3.5 mmol) and acetic acid (0.14 g, 2.5mmol) in 1,2-dichloroethane (11 ml) was allowed to stir at roomtemperature for 12 hours. The reaction was quenched with 1N sodium (100ml), extracted with methylene chloride (3×100 ml). The organic layer wasdried over anhydrous magnesium sulfate, and filtered. Chromatography (1%methanol-ethyl acetate) afforded 0.46 g (41%) of product.

The HCl salt was prepared in ethyl acetate: mp 300° C. Elementalanalysis for C₂₇H₃₀N₄O₂.HCl.0.07C₄H₈O₂; Calc'd: C, 65.84; H, 6.65; N,11.38; Found: C, 65.65; H, 6.47; N, 11.11.

EXAMPLE 26b3-{(1,4-trans)-4-[4-(2,3-Dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

The trans compound was isolated at the same time as the cis isomer in31% yield (0.34 g).

The HCl salt was prepared in ethyl acetate: mp 300° C. (decomposed).Elemental analysis for C₂₇H₃₀O₂N₄.HCl.0.08C₄H₈O₂; Calc'd: C, 66.43; H,6.69; N, 11.34; Found: C, 66.57; H, 7.02; N, 10.85.

EXAMPLE 27a8-{4-[(1,4-cis)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline

A solution of 4-(5-fluoro-1-indol-3-yl)-cyclohexanone (0.54 g, 2.3mmol), 8-(piperazin-1-yl)-quinoline (0.5 g, 2.3 mmol), sodiumtriacetoxyborohydride (0.75 g, 3.5 mmol) and acetic acid (0.27 ml, 4.7mmol) in 1,2-dichloroethane (20 ml) was allowed to stir at roomtemperature for overnight. The reaction was quenched with 1N sodiumhydroxide (20 ml), extracted with methylene chloride (3×100 ml), andwashed with brine (3×100 ml). The organic layer was dried over anhydroussodium sulfate and filtered. Chromatography (5% methanol-ethyl acetate)afforded 0.46 g (46%) of product as a white solid: mp 122-125° C.

The HCl salt was prepared in ethanol: mp 209-212° C. Elemental analysisfor C₂₇H₂₉FN₄.3HCl; Calc'd: C, 66.28; H, 6.00; N, 10.42; Found: C,60.23; H, 6.29; N, 10.21.

EXAMPLE 27b8-{4-[(1,4-trans)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline

The trans compound was isolated at the same time as the cis isomer in25% yield (0.25 g) as a white solid: mp 207.5-209° C.

The HCl salt was prepared in ethanol: mp 286-288° C. Elemental analysisfor C₂₇H₂₉FN₄.HCl; Calc'd: C, 64.67; H, 6.23; N, 11.17; Found: C, 64.74;H, 6.27; N, 11.06.

EXAMPLE 288-{4-(1,4-cis)-4-[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline

To a suspension of sodium hydride (60%, 0.03 g, 0.76 mmol) in anhydrousN,N-dimethylformamide (4 ml) was added8-{4-[(1,4-cis)-4-(5-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline(0.25 g, 0.58 mmol) in 6 ml anhydrous N,N-dimethylformamide at roomtemperature. The mixture was stirred at room temperature for 30 minutes,then iodomethane (0.044 ml, 0.7 mmol) was added to the above solution.The resulting mixture was stirred at room temperature for 30 minutes,and quenched with water. The mixture was extracted with ethyl acetateand the organic layer was dried over anhydrous sodium sulfate. Thesolvent was removed under vacuum. Chromatography (50%methylene-ethylactate plus 5% methanol) afforded 0.22 g (85%) of productas a yellow solid: mp>200° C.

The HCl salt was prepared in ethanol: mp 261-263.5° C. Elementalanalysis for C₂₈H₃₁FN₄.2HCl.H₂O; Calc'd: C, 63.03; H, 6.61; N, 10.50;Found: C, 63.39; H, 6.43; N, 10.21.

EXAMPLE 29a3-[(1,4-cis)-4-(4-Quinolin-8-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile

A solution of 4-(5-cyano-1-indol-3-yl)-cyclohexanone (1.47 g, 6.2 mmol),8-(piperazin-1-yl)-quinoline (1.32 g, 6.2 mmol), sodiumtriacetoxyborohydride (2.0 g, 7.2 mmol) and acetic acid (0.71 ml, 12mmol) in 1,2-dichloroethane (40 ml) was allowed to stir at roomtemperature overnight. The reaction was quenched with 1N sodiumhydroxide (20 ml), extracted with methylene chloride (3×100 ml), andwashed with brine (3×100 ml). The organic layer was dried over anhydroussodium sulfate and filtered. Chromatography (5% methanol-ethyl acetate)afforded 1.48 g (55%) of product as a white solid: mp 149-151° C.

The HCl salt was prepared in ethanol: mp 209-212° C. Elemental analysisfor C₂₇H₂₉FN₄.2HCl.0.75H₂O; Calc'd: C, 64.43; H, 6.28; N, 13.58; Found:C, 64.46; H, 6.29; N, 13.37.

EXAMPLE 29b3-[(1,4-trans)-4-(4-Quinolin-8-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile

The trans compound was isolated at the same time as the cis isomer in26% yield (0.55 g) as a white solid: mp 276-278° C.

The HCl salt was prepared in ethanol: mp 286-288° C. Elemental analysisfor C₂₇H₂₉FN₄.2HCl.0.5H₂O; Calc'd: C, 64.98; H, 6.23; N, 13.53; Found:C, 65.28; H, 5.96; N, 13.30.

EXAMPLE 301-Methyl-3-[(1,4-cis)-4-(4-quinolin-8-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile

To a suspension of sodium hydride (60%, 0.06 g, 1.4 mmol) in anhydrousN,N-dimethylformamide (8 ml) was added3-[(1,4-cis)-4-(4-quinolin-8-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile(0.30 g, 0.69 mmol) in 4 ml anhydrous N,N-dimethylformamide at roomtemperature. The mixture was stirred at room temperature for 30 minutes,followed by the addition of iodomethane (0.051 ml, 0.83 mmol) to theabove solution. The resulting mixture was stirred at room temperaturefor 30 minutes and quenched with water. The mixture was extracted withethyl acetate, dried over anhydrous sodium sulfate, and the solventremoved under vacuum. Chromatography (50% methylene-ethyl acetate plus5% methanol) afforded 0.27 g (90%) of product as a light yellow solid:mp 208-209° C.

The HCl salt was prepared in ethanol: mp 288-289° C. Elemental analysisfor C₂₉H₃₁N₅.2HCl.0.15C₄H₁₀O; Calc'd: C, 66.62; H, 6.52; N, 13.12;Found: C, 66.79; H, 6.74; N, 12.81.

EXAMPLE 31a5-Fluoro-3-{(1,4-cis)-4-[4-(6-fuoro-chroman-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole

A solution of 4-(5-fluoro-1-indol-3-yl)-cyclohexanone (0.49 g, 2.1mmol), 4-(6-fluoro-chroman-8-yl)-piperazine (0.5 g, 2.1 mmol), sodiumtriacetoxyborohydride (0.67 g, 3.2 mmol) and acetic acid (0.24 ml, 4.2mmol) in 1,2-dichloroethane (20 ml) was allowed to stir at roomtemperature overnight. The reaction was quenched with 1N sodiumhydroxide (20 ml), extracted with methylene chloride (3×100 ml), andwashed with brine (3×100 ml). The organic layer was dried over anhydroussodium sulfate and filtered. Chromatography (5% methanol-ethyl acetate)afforded 0.42 g (44%) of product as a white foam.

The HCl salt was prepared in ethanol: mp 199-200.5° C. Elementalanalysis for C₂₇H₃₁F₂ON₃.HCl.0.5H₂O; Calc'd: C, 65.25; H, 6.69; N, 8.45;Found: C, 65.04; H, 6.61; N, 8.29.

EXAMPLE 31b5-Fluoro-3-{(1,4-trans)-4-[4-(6-fluoro-chroman-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole

The trans compound was isolated at the same time as the cis isomer in35% yield (0.33 g) as a clear oil.

The HCl salt was prepared in ethanol: mp 286-288° C. Elemental analysisfor C₂₇H₃₁F₂ON₃.HCl.0.5H₂O; Calc'd: C, 65.25; H, 6.69; N, 8.45; Found:C, 65.09; H, 6.63; N, 8.29.

EXAMPLE 32a5-Fluoro-3-{(1,4-cis)-4-[4-(5-fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole

A solution of 4-(5-fluoro-1-indol-3-yl)-cyclohexanone (0.52 g, 2.2mmol), 4-(5-fluoro-2,3-dihydro-benzofuran-7-yl)-piperazine (0.5 g, 2.2mmol), sodium triacetoxyborohydride (0.72 g, 3.4 mmol) and acetic acid(0.26 ml, 4.5 mmol) in 1,2-dichloroethane (20 ml) was allowed to stir atroom temperature overnight. The reaction was quenched with 1N sodiumhydroxide (20 ml), extracted with methylene chloride (3×100 ml), andwashed with brine (3×100 ml). The organic layer was dried over anhydroussodium sulfate and filtered. Chromatography (5% methanol-ethyl acetate)afforded 0.37 g (38%) of product as a white solid: mp 182-183.5° C.

The HCl salt was prepared in ethanol: mp 196-198° C. Elemental analysisfor C₂₆H₂₉OF₂N₃.HCl.0.5H₂O; Calc'd: C, 64.65; H, 6.47; N, 8.70; Found:C, 64.45; H, 6.20; N, 8.60.

EXAMPLE 32b5-Fluoro-3-{(1,4-trans)-4-[4-(5-fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole

The trans compound was isolated at the same time as the cis isomer in34% yield (0.34 g) as a clear oil.

The HCl salt was prepared in ethanol: mp 303-305° C. Elemental analysisfor C₂₆H₂₉F₂ON₃.HCl.0.5H₂O; Calc'd: C, 64.65; H, 6.47; N, 8.70; Found:C, 64.86; H, 6.40; N, 8.36.

EXAMPLE 33a3-{(1,4-cis)-4-[4-(5-Fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

A solution of 4-(5-cyano-1-indol-3-yl)-cyclohexanone (0.46 g, 1.9 mmol),4-(5-fluoro-2,3-dihydro-benzofuran-7-yl)-piperazine (0.43 g, 1.9 mmol),sodium triacetoxy-borohydride (0.62 g, 2.9 mmol) and acetic acid (0.22ml, 3.9 mmol) in 1,2-dichloroethane (20 ml) was allowed to stir at roomtemperature overnight. The reaction was quenched with 1N sodiumhydroxide (20 ml), extracted with methylene chloride (3×100 ml), andwashed with brine (3×100 ml). The organic layer was dried over anhydroussodium sulfate and filtered. Chromatography (5% methanol-ethyl acetate)afforded 0.35 g (41%) of product as a white foam.

The HCl salt was prepared in ethanol: mp 298-301° C. Elemental analysisfor C₂₇H₂₉FON₄.HCl.0.75H₂O; Calc'd: C, 65.58; H, 6.42; N, 11.33; Found:C, 65.38; H, 6.22; N, 11.14.

EXAMPLE 33b3-{(1,4-trans)-4-[4-(5-Fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

The trans compound was isolated at the same time as the cis isomer in23% yield (0.20 g) as a white foam.

The HCl salt was prepared in ethanol: mp 330-331° C. Elemental analysisfor C₂₇H₂₉FON₄.HCl.0.75H₂O; Calc'd: C, 65.58; H, 6.42; N, 11.33; Found:C, 65.17; H, 6.14; N, 10.97.

EXAMPLE 33c3-{(1,4-cis)-4-[4-(5-Fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a suspension of sodium hydride (60%, 0.036 g, 0.9 mmol) in anhydrousN,N-dimethylformamide (2 ml) was added3-{(1,4-cis)-4-[4-(5-fluoro-2,3-dihydro-benzofuran-7-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile(0.2 g, 0.45 mmol) in 6 ml anhydrous N,N-dimethylformamide at roomtemperature. The mixture was stirred at room temperature for 30 minutes,followed by the addition of iodomethane (0.034 ml, 0.54 mmol) to theabove solution. The resulting mixture was stirred at room temperaturefor 30 minutes, and quenched with water. The mixture was extracted withethyl acetate, and the organic layer was dried over anhydrous sodiumsulfate. The solvent was removed under vacuum. Chromatography (5%methanol-ethyl acetate) afforded 0.18 g (87%) of product as a whitesolid: mp 207-208° C.

The HCl salt was prepared in ethanol: mp 282-284° C. Elemental analysisfor C₂₈H₃₁FON₄.HCl; Calc'd: C, 67.94; H, 6.52; N, 11.32; Found: C,67.61; H, 6.39; N, 10.98.

EXAMPLE 34a3-[(1,4-cis)-4-[4-(Benzofuran-7-yl-piperazin-1-yl]-cyclohexyl]-1H-indole-5-carbonitrile

A solution of 4-(5-fluoro-1-indol-3-yl)-cyclohexanone (0.72 g, 3.1mmol), 1-(7-benzofuranyl)piperazine (0.55 g, 2.8 mmol), sodiumtriacetoxyborohydride (0.84 g, 3.9 mmol) and acetic acid (0.18 g, 2.8mmol) in 1,2-dichloroethane (80 ml) was allowed to stir at roomtemperature overnight. The reaction was quenched with 0.5 N sodiumhydroxide (100 ml), extracted with methylene chloride (2×100 ml. Theorganic layer was dried over anhydrous magnesium sulfate and filtered.The solvent was removed, crystals appeared after 1 hour. The crystalswere triturated with ethyl ether (80 ml) to afford 0.47 g (35%) ofproduct as a white solid: mp 158-159° C.

The HCl salt was prepared in ethanol: mp 295-296° C. Elemental analysisfor C₂₇H₂₈ON₄.HCl.0.25H₂O; Calc'd: C, 69.66; H, 6.39; N, 12.04; Found:C, 69.56; H, 6.38; N, 12.12.

EXAMPLE 34b3-[(1,4-trans)-4-[4-(Benzofuran-7-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile

The remaining residue of the above reaction was purified bychromatography (acetone- methanol-hexanes: 3:5:3) to afford 0.17 g (12%)of product as a glass.

The HCl salt was prepared in ethanol: mp 330-331° C. Elemental analysisfor C₂₇H₂₈FON₄.HCl.0.75H₂O; Calc'd: C, 65.58; H, 6.42; N, 11.33; Found:C, 65.17; H, 6.14; N, 10.97.

EXAMPLE 355-Fluoro-3-{4-[4-(2-methoxy-phenyl)-piperazin-1-yl]cyclohex-1-enyl}-1H-indole

This compound was prepared in the manner described above for Example 18by replacing 4-(5-fluoro-1H-indol-3-yl)-cyclohexanone (1.71 g, 7.9 mmol)with 4-(5-fluoro-1H-3-indolyl)-cyclohex-3-enone in 32% (0.26 g) yield.

The HCl salt was prepared in ethyl acetate: mp 250° C. Elementalanalysis for C₂₅H₂₈OFN₃.HCl; Calc'd: C, 67.94; H, 6.61; N, 9.51; Found:C, 66.47; H, 6.58; N, 9.38.

EXAMPLE 363-{4-[4-(1H-Indol-4-yl)-piperazin-1-yl]-cyclohex-1-enyl}-1H-indole-5-carbonitrile

This compound was prepared in the manner described above for Example 18by replacing with 4-(5-fluoro-1H-3-indolyl)-cyclohex-3-enone with4-(5-cyano-1H-3-indolyl)-cyclohex-3-enone in (0.7 g, 2.96 mmol) in 62%(0.78 g) yield.

The HCl salt was prepared in ethyl acetate: mp 199-201° C. Elementalanalysis for C₂₇H₂₇N₅.2HCl; Calc'd: C, 66.25; H, 6.49; N, 14.31; Found:C, 66.43; H, 6.24; N, 14.27.

EXAMPLE 385-Fluoro-3-{cis-4-[4-(1H-indol-4-yl)-piperazinyl]-cyclohexyl}-1-methyl-1H-indole

This compound was prepared in the manner described above for Example 2by replacing with 4-(5-fluoro-1H-3-indolyl)-cyclohexone with4-(5-fluoro-1-methyl-3-indolyl)-cyclohexone in (0.34 g, 1.4 mmol) in 34%(0.24 g) yield as a clear oil.

The HCl salt was prepared in ethanol: mp 247-249° C. Elemental analysisfor C₂₇H₃₁FN₄.2HCl.0.25H₂O; Calc'd: C, 63.84; H, 6.65; N, 11.03; Found:C, 63.88; H, 6.51; N, 10.77.

EXAMPLE 39a3-{(1,4-cis)-4-[4-(Quinoxalin-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

A solution of 4-(5-cyano-1H-3-indolyl)-cyclohexanone (443 mg, 1.87mmol), Intermediate 34 (400 mg, 1.87 mmol), acetic acid (0.22 mL, 3.7mmol), and sodium triacetoxyborohydride (590 mg, 2.8 mmol) indichloroethane (50 mL) was stirred at room temperature overnight. Thereaction was quenched with 1 M NaOH (100 mL) and extracted into CH₂Cl₂(3×100 mL). The organic fractions were combined, dried over Na₂SO₄, andfiltered. The resulting oil was purified by column chromatography (5%MeOH/EtOAc) yielding 130 mg (16%) of the product as a yellow solid: mp223-225° C.

Elemental Analysis for C₂₇H₂₈N₆.1H₂O;

Calc'd C, 71.34; H, 6.65; N, 18.49 Found C, 71.02; H, 6.33; N, 18.03

EXAMPLE 39b3-{(1,4-trans)-4-[4-(Quinoxalin-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomeraffording 240 mg (29%) of a pale yellow solid: mp 257-259° C.

Elemental Analysis for C₂₇H₂₈N₆.1H₂O;

Calc'd C, 71.34; H, 6.65; N, 18.49 Found C, 71.63; H, 6.38; N, 18.39

EXAMPLE 40a3-[(1,4-cis)-4-(4-Quinolin-5-yl-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile

To a solution of 5-(1-piperazinyl)-quinoline (500 mg, 2.35 mmol),4-(5-cyano-1H-3-indolyl)-cyclohexanone (540 mg, 2.35 mmol), and sodiumtriacetoxyborohydride (740 mg, 3.5 mmol) in dichloroethane (20 mL) wasadded acetic acid (0.27 mL, 4.7 mmol) and stirred overnight at roomtemperature. The reaction was quenched with 1 M NaOH (50 mL) andextracted in CH₂Cl₂ (3×100 mL). The organic fractions were combined,dried over Na₂SO₄, concentrated, filtered and chromatographed (5%MeOH/EtOAc) yielding 410 mg (41%) of the cis isomer as a white solid.The HCl salt was generated from EtOAc yielding a white solid: mp220-223° C.

Elemental Analysis for C₂₈H₂₉N₅.HCl.1H₂O;

Calc'd C, 68.62; H, 6.58; N, 14.29 Found C, 68.99; H, 6.54; N, 14.06

EXAMPLE 40b3-[(1,4-trans)-4-(4-Quinolin-5-yl)-piperazin-1-yl)-cyclohexyl]-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomer inExample 40a affording 180 mg (18%) as a beige solid. The HCl salt wasgenerated from EtOAc yielding a white solid: mp 210-211° C.

Elemental Analysis for C₂₈H₂₉N₅.HCl.0.4H₂O;

Calc'd C, 70.17; H, 6.48; N, 14.62 Found C, 70.23; H, 6.21; N, 14.45

EXAMPLE 40c5-{4-[(1,4-cis)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline

This compound was prepared in the same manner as the compound in Example40a replacing 4-(5-cyano-1H-3-indolyl)-cyclohexanone with4-(5-fluoro-1H-3-indolyl)-cyclohexanone (540 mg, 2.35 mmol) to afford410 mg (41%) of a pale 20 yellow solid: mp 220-223° C.; MS (+) ESI m/e429 [M+H]⁺.

EXAMPLE 40d5-{4-[(1,4-trans)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-isoquinoline

The trans isomer was isolated at the same time as the cis isomer ofExample 40c as the cis isomer of Example 40c affording 180 mg (18%) as awhite solid: mp 210-211° C.; MS (+) ESI m/e 429 [M+H]⁺.

EXAMPLE 40e5-{4-[(1,4-cis)-4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline

To a solution of NaH (38 mg, 0.94 mmol) in anhydrous DMF (4 mL) undernitrogen atmosphere was added a solution of5-{4-[(1,4-cis)-4-(5-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline(200 mg, 0.47 mmol) in DMF (6 mL). The mixture was stirred at roomtemperature 0.5 hour after which MeI (0.035 mL, 0.56 mmol) was added viasyringe. The reaction mixture was stirred an additional 0.5 hour andthen quenched with H₂O (50 mL) and extracted with EtOAc (3×50 mL). Theorganic fractions were combined, dried over Na₂SO₄ and concentratedyielding 190 mg (92%) of a clear oil. The HCl salt was made from EtOAcaffording a pale yellow solid: mp decomposes>270° C.

Elemental Analysis for C₂₇H₃₁FN₄.HCl.0.75H₂O;

Calc'd C, 68.28; H, 6.86; N, 11.37 Found C, 68.34; H, 6.56; N, 11.26

EXAMPLE 41a5-Fluoro-3-[(1,4-cis)-4-(4-naphthalen-1-yl-piperazine-1-yl)-cyclohexyl]-1H-indole

This compound was prepared in the same manner as the compound of Example40a replacing 4-(5-cyano-1H-3-indolyl)-cyclohexanone with4-(5-fluoro-1H-3-indolyl)-cyclohexanone (437 mg, 1.9 mmol) and5-(1-piperazinyl)-quinoline with 1-(1-naphthyl)piperazine (410 mg, 1.9mmol) affording 240 mg (29%) of the product as a white solid: mp195-197° C.

Elemental Analysis for C₂₈H₃₀FN₃;

Calc'd C, 78.66; H, 7.07; N, 9.83 Found C, 78.24; H, 7.06; N, 9.59

EXAMPLE 41b5-Fluoro-3-[(1,4-trans)-4-(4-naphthalen-1-yl-piperazine-1-yl)-cyclohexyl]-1H-indole

The trans isomer was isolated at the same time as the cis isomer ofExample 41a affording 70 mg (9%) of a white solid: mp 179-181° C.

Elemental Analysis for C₂₈H₃₀FN₃;

Calc'd C, 78.66; H, 7.07; N, 9.83 Found C, 78.28; H, 7.05; N, 9.79

EXAMPLE 42a5-{4-[(1,4-cis)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]piperazin-1-yl}-isoquinoline

This compound was prepared in the same manner as described for thecompound of Example 36a replacing5-(trifluoromethylsulfonyloxy)-quinoline with5-(trifluoromethylsulfonyloxy)-isoquinoline (12 g, 43.3 mmol) to affordan inseparable mixture of the desired product and impurities. Themixture was treated with TFA (10 mL), MeOH (10 drops), and CH₂Cl₂ (20mL) at 0° C. and warmed to room temperature overnight. The resultingsolution was concentrated and the redissolved in CH₂Cl₂ and neutralizedwith NaHCO₃. The aqueous layer was extracted in CH₂Cl₂ (3×100 mL) andEtOAc (3×100 mL), dried over Na₂SO₄, filtered and concentrated giving abright orange oil. The oil was purified twice by column chromatography(10% MeOH/CH₂Cl₂/NH₄OH) but a highly colored impurity persisted. The5-(1-piperazinyl)-isoquinoline (450 mg, 2.1 mmol),4-(5-fluoro-1H-3-indolyl)-cyclohexanone (485 mg, 2.1 mmol) and sodiumtriacetoxyborohydride (672 mg, 3.2 mmol) were dissolved indichloroethane (30 mL). Acetic acid (0.25 mL, 4.2 mmol) was added andthe resulting solution stirred at ambient temperature overnight. Thereaction mixture was quenched with 1 M NaOH (40 mL) and extracted inCH₂Cl₂ (4×100 mL). The organic fractions were combined, dried overNa₂SO₄ and concentrated yielding a yellow oil which was purified bycolumn chromatography (5% MeOH/EtOAc) affording 300 mg (33% from5-(1-piperazinyl)isoquinoline) of the title compound as a beige solid:mp 209-211° C.

Elemental Analysis for C₂₇H₂₉FN₄;

Calc'd C, 75.67; H, 6.82; N, 13.07 Found C, 75.40; H, 6.83; N, 12.89

EXAMPLE 42b5-{4-[(1,4-trans)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]piperazin-1-yl}-isoquinoline

The trans isomer was isolated at the same time as the cis isomer ofExample 42a affording 110 mg (12%) of a pink solid: mp 218-221° C.

Elemental Analysis for C₂₈H₂₉FN₄.0.25H₂O;

Calc'd C, 74.89; H, 6.87; N, 12.94 Found C, 74.79; H, 6.79; N, 12.85

EXAMPLE 43a1{4-[(1,4-cis)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-isoquinoline

This compound was prepared in the same manner as the compound of Example40a replacing 4-(5-cyano-1H-3-indolyl)-cyclohexanone with4-(5-fluoro-1H-3-indolyl)-cyclohexanone (530 mg, 2.3 mmol) and5-(1-piperazinyl)-quinoline with 1-(1-piperazinyl)-isoquinoline (500 mg,2.3 mmol) affording 260 mg (27%) of the product as a pale yellow solid:mp 180-183° C.

Elemental Analysis for C₂₇H₂₉FN₄.0.5H₂O;

Calc'd C, 74.11; H, 6.91; N, 12.81 Found C, 74.13; H, 6.58; N, 12.60

EXAMPLE 43b1{4-[(1,4-trans)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-isoquinoline

The trans isomer was isolated at the same time as the cis isomer ofExample 43a affording 180 mg (18%) of a white solid: mp 232-235° C.Elemental Analysis for C₂₇H₂₉FN₄.0.25H₂O;

Calc'd C, 74.89; H, 6.87; N, 12.94 Found C, 74.68; H, 6.88; N, 12.64

EXAMPLE 43c1{4-[(1,4-cis)-4-(5-Cyano-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-isoquinoline

This compound was prepared in the same manner as the compound of Example40a replacing 5-(1-piperazinyl)-quinoline with1-(1-piperazinyl)-isoquinoline (500 mg, 2.3 mmol) affording 230 mg (23%)of the product as a pale yellow solid: mp 107-109° C.; HRMS EI m/e435.2431 (M³⁰ ).

EXAMPLE 43d1{4-[(1,4-trans)-4-(5-Cyano-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-isoquinoline

The trans isomer was isolated at the same time as the cis isomer ofExample 43c affording 170 mg (17%) of a white solid: mp 252-255° C.; MS(+) APCI m/e 436 (M+H)⁺.

EXAMPLE 44a8-{(1,4-cis)-4-[4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

To a solution of 0.360 g of 6-Methoxy, 8-piperazino-quinoline in 10 mLof CH₂Cl₂, was added 0.285 g of 4-(5-fluoro-1-H-3-indolyl)-cyclohexanonefollowed by 0.625 g of sodium triacetoxyborohydride and 0.09 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 75 mL of silica gel using 50% ethylacetate/hexanes, 75% ethyl acetate/hexanes, and finally 100% ethylacetate to give 0.053 g of the desired product: mp 226-227° C.; MS (ES)m/z (relative intensity): 459 (M+H+, 100).

EXAMPLE 44b8-{(1,4-trans)-4-[4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

The trans isomer of the compound of Example 44a was isolated at the sametime as the cis isomer as an off white solid (0.013 g). mp 207-215° C.MS (ES) m/z (relative intensity): 459 (M+H+, 100).

EXAMPLE 44c3-{(1,4-cis)-4-[4-(6-Methoxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

To a solution of 1.0 g of 6-Methoxy, 8-piperazino-quinoline in 20 mL ofCH₂Cl₂, was added 0.979 g of3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrile followed by 1.3 g ofsodium triacetoxyborohydride and 0.246 mL acetic acid. The reaction wasstirred at room temperature overnight. It was quenched with 1N NaOH, andthe product was extracted with CH₂Cl₂. The organic phase was washed withwater and dried over magnesium sulfate. The product was filtered through300 mL of silica gel using 2.5% MeOH/CH₂Cl₂ to give 0.550 g of thedesired product: mp 183-185° C.; MS (ES) m/z (relative intensity): 466(M+H+, 100). The hydrochloride was also prepared to give a yellow solidmp 183-185° C.

EXAMPLE 44d3-{(1,4-trans)-4-[4-(6-Methoxy-quinolin-8-yl)-piperazin-1-yl(-cyclohexyl}-1H-indole-5-carbonitrile

The trans isomer of the compound of Example 44c was isolated at the sametime as the cis isomer as an off white solid (0.170 g) mp 148-152C. MS(ES) m/z (relative intensity): 466 (M+H+, 100). The maleic acid salt wasprepared to give an off white solid (0.129 g). mp 160-165° C.

EXAMPLE 45a6-Chloro-8-{4-[(1,4-cis)-4-(5-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline

To a solution of 0.200 g of 6-Chloro, 8-piperazino-quinoline in 10 mL ofCH₂Cl₂, was added 0.266 g of 4-(5-fluoro-1-H-3-indolyl)-cyclohexanonefollowed by 0.430 g of sodium triacetoxyborohydride and 0.09 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 75 mL of silica gel using 50% ethylacetate/hexanes, and then 75% ethyl acetate/hexanes, to give 0.119 g ofthe desired product: mp 166-176° C.; MS (ES) m/z (relative intensity):464 (M+H+, 100).

Elemental analysis for C₂₇H₂₈ClFN₄; Calculated: C: 70.04; H: 6.1; N:12.1; Found: C: 70.07; H: 6.33; N: 11.87.

EXAMPLE 45b6-Chloro-8-{4-[(1,4-trans)-4-(5-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline

The trans isomer of the compound of Example 45a was isolated at the sametime as the cis isomer as an off white solid (0.026 g) mp 209-210° C. MS(ES) m/z (relative intensity): 464 (M+H+100).

Elemental analysis for C₂₇H₂₈ClFN₄; Calculated: C: 70.04; H: 6.1; N:12.1; Found: C: 70.23; H: 6.33; N: 11.94.

EXAMPLE 45c3-{(1,4-cis)-4-[4-(6-Chloro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

To a solution of 0.250 g of 6-chloro, 8-piperazino-quinoline in 10 mL ofCH₂Cl₂, was added 0.240 g of3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrile followed by 0.532 g ofsodium triacetoxyborohydride and 0.09 mL acetic acid. The reaction wasstirred at room temperature overnight. It was quenched with 1N NaOH, andthe product was extracted with ether. The organic phase was washed withwater and dried. The product was filtered through 75 mL of silica gelusing 25% ethyl acetate/hexanes, and then 75% ethyl acetate/hexanes, togive 0.123 g of the desired product: mp 152-160° C.; MS (ES) m/z(relative intensity): 471 (M+H+, 100).

EXAMPLE 45d3-{(1,4-trans)-4-[4-(6-Chloro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

The trans isomer of the compound of Example 45c was isolated at the sametime as the cis isomer as an off white solid (0.032 g) mp 144-152° C. MS(ES) m/z (relative intensity): 471 (M+H+, 100).

EXAMPLE 46a5-Chloro-8-{4-[(1,4-cis)-4-(5-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline

To a solution of 0.250 g of 5-chloro, 8-piperazino-quinoline in 10 mL ofCH₂Cl₂, was added 0.200 g of 4-(5-fluoro-1-H-3-indolyl)-cyclohexanonefollowed by 0.533 g of sodium triacetoxyborohydride and 0.09 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with ether. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 75 mL of silica gel using 25% ethylacetate/hexanes, 75% ethyl acetate/hexanes, to give 0.074 g of thedesired product: mp 101-104° C.; MS (ES) m/z (relative intensity): 464(M+H+, 100).

EXAMPLE 46b3-{(1,4-cis)-4-[4-(5-Chloro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

To a solution of 0.300 g of 5-chloro, 8-piperazino-quinoline in 10 mL ofCH₂Cl₂, was added 0.230 g of3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrile followed by 0.550 g ofsodium triacetoxyborohydride and 0.09 mL acetic acid. The reaction wasstirred at room temperature overnight. It was quenched with 1N NaOH, andthe product was extracted with CH₂Cl₂. The organic phase was washed withwater and dried over magnesium sulfate. The product was filtered through75 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.051 g of thedesired product: mp 135-144° C.; MS (ES) m/z (relative intensity): 471(M+H+, 100).

EXAMPLE 47a5-Fluoro-8-{4-[(1,4-cis)-4-(6-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline

To a solution of 0.231 g of 5-fluoro, 8-piperazino-quinoline in 10 mL ofCH₂Cl₂, was added 0.230 g of 4-(6-fluoro-1-H-3-indolyl)-cyclohexanonefollowed by 0.530 g of sodium triacetoxyborohydride and 0.09 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 50% ethylacetate/hexanes, 100% ethyl acetate, then 6% MeOH/ethyl acetate to give0.049 g of the desired product: mp 172-174° C.; MS (ES) m/z (relativeintensity): 447 (M+H+, 100).

EXAMPLE 47b5-Fluoro-8-{4-[(1,4-trans-4-(6-fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-quinoline

The trans isomer of the compound of Example 47a was isolated at the sametime as the cis isomer as an off white solid (0.055 g) mp 173-175° C. MS(ES) m/z (relative intensity): 447 (M+H+, 100).

EXAMPLE 48a3-{(1,4-cis)-4-[4-(2-Methyl-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

To a solution of 0.230 g of 8-piperazino-quinaldine in 10 mL of CH₂Cl₂,was added 0.238 g of 3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrilefollowed by 0.527 g of sodium triacetoxyborohydride and 0.09 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 50% ethylacetate/hexanes, 100% ethyl acetate and finally 10% MeOH/ethyl acetateto give 0.089 g of the desired product: mp 197-199° C.; MS (ES) m/z(relative intensity): 450 (M+H+, 100).

EXAMPLE 48b3-{(1,4-trans)-4-[4-(2-Methyl-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

The trans isomer of the compound of Example 48a was isolated at the sametime as the cis isomer as an off white solid (0.058 g) mp 268-280° C. MS(ES) m/z (relative intensity): 450 (M+H+, 100).

EXAMPLE 49a4-{4-[(1,4-cis)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-2-trifluoromethyl-quinoline

To a solution of 0.281 g of 1-[2-(trifluoromethyl)quinol-4yl]piperazinein 10 mL CH₂Cl₂, was added 0.231 g of4-(5-fluoro-1-H-3-indolyl)-cyclohexanone followed by 0.528 g of sodiumtriacetoxyborohydride and 0.09 mL acetic acid. The reaction was stirredat room temperature overnight. It was quenched with 1N NaOH, and theproduct was extracted with ether. The organic phase was washed withwater and dried over magnesium sulfate. The product was filtered through100 mL of silica gel using 25% ethyl acetate/hexanes,then 50% ethylacetate/hexanes, to give 0.089 g of the desired product: mp 235-239° C.;MS (ES) m/z (relative intensity): 497 (M+H+, 100).

EXAMPLE 49b4-{4-[(1,4-trans)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-2-trifluoromethyl-quinoline

The trans isomer of the compound of Example 49A was isolated at the sametime as the cis isomer as an off white solid (0.110 g) mp 218-223° C. MS(ES) m/z (relative intensity): 497 (M+H+, 100).

EXAMPLE 49c3-{(1,4-cis)-4-[4-(2-Trifluoromethyl-quinolin-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

This compound was prepared in the same manner as in Example 49areplacing 4-(5-fluoro-1-H-3-indolyl)-cyclohexanone with3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrile tto afford 0.137 g of awhite solid. mp 235-239° C.; MS (ES) m/z (relative intensity): 504(M+H+, 100).

Elemental analysis for C₂₉H₂₈F₃N₅; Calculated: C: 69.17; H: 5.6; N:13.91; Found: C: 68.96; H: 5.37; N: 13.8.

EXAMPLE 49d3-{(1,4-trans)-4-[4-(2-Trifluoromethyl-quinolin-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

The trans isomer of the compound of Example 49C was isolated at the sametime as the cis isomer as an off white solid (0.036 g) mp 259-264° C. MS(ES) m/z (relative intensity): 504 (M+H+, 100).

EXAMPLE 50a4-{4-[(1,4-cis)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

To a solution of 0.280 g of 6-methoxy-4-piperazino-quinoline in 10 mLCH₂Cl₂, was added 0.230 g of 4-(5-fluoro-1-H-3-indolyl)-cyclohexanonefollowed by 0.530 g of sodium triacetoxyborohydride and 0.09 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂ . Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 100% ethylacetate, then 10% MeOH/ethyl acetate, to give 0.036 g of the desiredproduct: mp 222-227° C.; MS (ES) m/z (relative intensity): 459 (M+H+,100).

EXAMPLE 50b4-{4-[(1,4-trans)-4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

The trans isomer of the compound of Example 50a was isolated at the sametime as the cis isomer as an off white solid (0.027 g) mp 249-251° C. MS(ES) m/z (relative intensity): 459 (M+H+, 100).

EXAMPLE 50c3-{(1,4-cis)-4-[4-(6-Methoxy-quinolin-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

This compound was prepared in the same manner as in Example 50areplacing 4-(5-fluoro-1-H-3-indolyl)-cyclohexanone with3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrile to afford 0.016 g of awhite solid. mp 271-272° C.; MS (ES) m/z (relative intensity): 466(M+H+, 100).

EXAMPLE 50d3-{(1,4-trans)-4-[4-(6-Methoxy-quinolin-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

The trans isomer of the compound of Example 50c was isolated at the sametime as the cis isomer as an off white solid (0.014 g) mp 288-292° C. MS(ES) m/z (relative intensity): 466 (M+H+, 100).

EXAMPLE 51a(cis)-3-{4-[4-(6-Methoxy-2-methylquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a mixture of 4-(6-methoxy-2-methylquinolin-8-yl)piperazine (300 mg,1.16 mmol), 3-(1-methyl-1H-indole-5-carbonitrile)cyclohexane-4-one (440mg, 1.75 mmol), and sodium triacetoxyborohydride (495 mg, 2.34 mmol) in5 mL of anhydrous THF was added 70 μL (73 mg, 1.22 mmol) glacial aceticacid. The resulting mixture was stirred at ambient temperature under N₂for 24 hours. The reaction was treated with saturated aqueous sodiumbicarbonate (50 mL), and aqueous mixture was extracted with CH₂Cl₂ (3×50mL). The organic layers were combined, dried over anhydrous Na₂SO₄,filtered, and concentrated in vacuo. Flash chromatography on 4×15 cmSiO₂ (gradient elution, 50% EtOAc/hex to 100% EtOAc then 5% MeOH/EtOAc)afforded still impure title compound. A second chromatography using thesame eluent on 2×20 cm SiO₂ afforded 190 mg (33%) of clean product and140 mg of still impure product. Recrystallization of the clean productfrom EtOAc/hexane afforded 100 mg (17%) of the title compound: mp201-203° C.

Elemental analysis for C₃₁H₃₅N₅O.0.1C₄H₈O₂; Calc'd: C, 75.06; H, 7.18;N, 13.94; Found: C, 75.00; 7.32; N, 13.83.

EXAMPLE 51b(cis)-3-{4-[4-(6-Methoxy-3-methylquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a mixture of 4-(6-methoxy-3-methylquinolin-8-yl)piperazine (210 mg,0.82 mmol), 3-(1-methyl-1H-indole-5-carbonitrile)cyclohexane-4-one (330mg, 1.31 mmol), and sodium triacetoxyborohydride (435 mg, 2.05 mmol) in5 mL of anhydrous THF was added 55 μL (68 mg, 0.96 mmol) glacial aceticacid. The resulting mixture was stirred at ambient temperature under N₂for 24 hours. The reaction was treated with saturated aqueous sodiumbicarbonate (50 mL), and the aqueous mixture was extracted with CH₂Cl₂(3×50 mL). The organic layers were combined, dried over anhydrousNa₂SO₄, filtered, and concentrated in vacuo. Flash chromatography on2×20 cm SiO₂ (5% MeOH/EtOAc). Afforded the title compound, which wasslightly impure. Recrystallization from EtOAc/hexane afforded 0.26 g(64%) of the title compound: mp 190-191.5° C.

Elemental analysis for C₃₁H₃₅N₅O; Calc'd: C, 75.43; H, 7.15; N, 14.19;Found: C, 75.13; 7.25; N, 14.01.

EXAMPLE 51c(cis)-3-{4-[4-(6-Methoxy-4-methylquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a mixture of 4-(6-methoxy-4-methylquinolin-8-yl)piperazine (0.2 g,0.78 mmol), 3-(1-methyl-1H-indole-5-carbonitrile)cyclohexane-4-one(0.215 g, 0.85 mmol), dichloroethane (10 mL) and glacial acetic acid(0.12 mL) was addded sodium triacetoxyborohydride (0.25 g, 1.16 mmol).The reaction mixture was stirred at ambient temperature for 24 hours.The reaction mixture was diluted with dichloromethane (60 ml), washedwith 1N aqueous sodium hydroxide (2×50 mL), water (50 mL), and brine (50mL). The organic layer was dried over anhydrous sodium sulfate, filteredand concentrated to give 0.43 g of crude product. Flash chromatographyon 50 g of silica gel (5% methanol/ethyl acetate) afforded 0.15 g (40%)of the title compound. Recrystallization from ethyl acetate/hexaneyielded 0.085 g (23%) of pure product: mp 210-212° C.

Elemental analysis for C₃₁H₃₅N₅O.0.25H₂O; Calc'd: C, 74.74; H, 7.18; N,14.06; Found: C, 74.82; H, 7.12; N, 14.11.

EXAMPLE 51d(trans)-3-{4-[4-(6-Methoxy-4-methylquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomer in 16%yield (0.062 g). Trituration with ethyl acetate/hexane afforded 0.058 g(15%) of pure title compound: mp 230-232° C.

Elemental analysis for C₃₁H₃₅N₅O.0.5H₂O; Calc'd: C, 74.07; H, 7.22; N,13.93; Found: C, 74.12; H, 7.10; N, 13.95.

EXAMPLE 52a(cis)-3-{4-[4-(6-Methoxy-5-methylquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The above compound was prepared utilizing the same method as that usedfor the preparation of(cis)-3-{4-[4-(6-methoxy-4-methylquinolin-8-yl)piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrileto give 0.25 g of the title compound. Recrystallization from ethylacetate afforded 0.125 g (20%) of pure product: mp 227-228° C.

Elemental analysis for C₃₁H₃₅N₅O.0.25H₂O; Calc'd: C, 74.74; H, 7.18; N,14.06; Found: C, 74.61; H, 7.20; N, 13.71.

EXAMPLE 52b(trans)-3-{4-[4-(6-Methoxy-5-methylquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer (0.15 g) was isolated at the same time as the ciscompound. Trituration from ethyl acetate afforded 0.110 g (18%) of pureproduct: mp 212-213° C.

Elemental analysis for C₃₁H₃₅N₅O.0.25H₂O; Calc'd: C, 75.43; H, 7.15; N,14.19; Found: C, 75.09; H, 7.10; N, 13.96.

EXAMPLE 52c(cis)-5-Chloro-8-{4-[-(5-fluoro-1-methyl-1H-indol-3-yl)cyclohexyl]piperazin-1-yl}-6-methoxyquinoline

The above compound was prepared utilizing the same method as that usedfor the preparation of(cis)-3-{4-[4-(6-methoxy-4-methylquinolin-8-yl)piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrileto give 0.13 g of the title compound. Trituration from ethyl acetateafforded 0.120 g (29%) of pure product.

Elemental analysis for C₂₉H₃₂ClFN₄O; Calc'd: C, 68.70; H, 6.36; N,11.05; Found: C, 68.45; H, 6.24; N, 10.89.

EXAMPLE 52d(trans)-5-Chloro-8-{4-[-(5-fluoro-1-methyl-1H-indol-3-yl)cyclohexyl]piperazin-1-yl}-6-methoxyquinoline

The trans isomer was isolated in 19% yield (0.075 g) at the same time asthe cis compound. Trituration from ethyl acetate afforded 0.070 g (17%)of pure product: mp 170-171° C.

Elemental analysis for C₂₉H₃₂ClFN₄O; Calc'd: C, 68.70; H, 6.36; N,11.05; Found: C, 68.44; H, 6.32; N, 11.02.

EXAMPLE 52e(cis)-3-{4-[4-(5-Chloro-6-methoxyquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The above compound was prepared utilizing the same method as that usedfor the preparation of(cis)-3-{4-[4-(6-methoxy-4-methylquinolin-8-yl)piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrileto give 0.1 g (24%) of title compound. Recrystallizion from ethylacetate afforded 0.080 g (20%) of pure product: mp 231-231° C.

Elemental analysis for C₃₀H₃₂ClN₅O.0.25H₂O; Calc'd: C, 69.48; H, 6.32;N, 13.50; Found: C, 69.49; H, 6.31; N, 13.29.

EXAMPLE 52f(trans)-3-{4-[4-(5-Chloro-6-methoxyquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated in 22% yield (0.095 g) at the same time asthe cis compound. Trituration from ethyl acetate afforded 0.070 g (17%)of pure product: mp 215-216° C.

Elemental analysis for C₃₀H₃₂ClN₅O.0.25 H₂O; Calc'd: C, 69.48; H, 6.32;N, 13.50; Found: C, 69.36; H, 6.28; N, 13.27.

EXAMPLE 53a4-{4-[(1,4-cis)-4-(1H-Indol-3-yl)cyclohexyl]piperazin-1-yl}-2-(trifluoromethyl)-1H-benzimidazole

To a solution of 4-piperazin-1-yl-2-trifluoromethyl-1H-benzoimidazole(400 mg, 1.48 mmol), 4-(1H-3-indolyl)-cyclohexanone (315 mg, 1.48 mmol),and sodium triacetoxyborohydride (470 mg, 2.22 mmol) in dichloroethane(30 mL) was added acetic acid (0.20 mL, 2.96 mmol) and stirred overnightat room temperature. The reaction was quenched with 1 M NaOH (50 mL) andextracted in CH₂Cl₂ (2×100 mL) and 50% EtOAc/MeOH (3×100 mL). Theorganic fractions were combined, dried over Na₂SO₄, concentrated,filtered and chromatographed twice (5% MeOH/EtOAc) yielding 170 mg (25%)of the cis isomer as a white solid. The HCl salt was generated fromEtOAc yielding a white solid: mp foams above 207° C.

Elemental analysis for C₂₆H₂₈F₃N₅.HCl.H₂O; Calc'd: C, 59.82; H, 5.99; N,13.42; Found: C, 60.18; H, 5.84; N, 13.29.

EXAMPLE 53b4-{4-[(1,4-trans)-4-(1H-Indol-3-yl)cyclohexyl]piperazin-1-yl}-2-(trifluoromethyl)-1H-benzimidazole

The trans isomer was isolated at the same time affording 180 mg (9%) asa beige solid. The HCl salt was generated from EtOAc yielding a whitesolid: mp decomposes above 200° C.

Elemental analysis for C₂₆H₂₈F₃N₅.HCl.0.75H₂O; Calc'd: C, 60.34; H,5.94; N, 13.53; Found: C, 60.37; H, 5.68; N, 13.43.

EXAMPLE 54a4-{4-[(1,4-cis)-4-(1H-Indol-3-yl)cyclohexyl]piperazin-1-yl}-1H-benzimidazole

This compound was prepared as described for 1a replacing4-piperazin-1-yl-2-trifluoromethyl-1H-benzoimidazole with4-piperazin-1-yl-1H-benzoimidazole (510 mg, 2.5 mmol) to afford 350 mg(34%) of the title compound as a yellow foam which was triturated withEt₂O to give a white solid: mp 217-219° C.

Elemental analysis for C₂₅H₂₉N₅; Calc'd: C, 75.16; H, 7.32, N, 17.53;Found: C, 74.82; H, 7.21; N, 17.05.

EXAMPLE 54b4-{4-[(1,4-trans)-4-(1H-Indol-3-yl)cyclohexyl]piperazin-1-yl}-1H-benzimidazole

The trans isomer was isolated at the same time affording 200 mg (20%) asa white solid. The HCl salt was generated from Et₂O/EtOH to give a whitesolid: mp decomposes above 215° C.

Elemental analysis for C₂₅H₂₉N₅.2HCl.H₂O; Calc'd: C, 61.22; H, 6.78; N,14.28; Found: C, 61.24; H, 6.97; N, 14.09.

EXAMPLE 55a4-{4-[(1,4-cis)-4-(1H-Indol-3-yl)cyclohexyl]piperazin-1-yl}-2-methyl-1H-benzimidazole

This compound was prepared as described for Example 53a replacing4-piperazin-1-yl-2-trifluoromethyl-1H-benzoimidazole with4-piperazin-1-yl-2-methyl-1H-benzoimidazole (340 mg, 1.57 mmol) toafford 350 mg (54%) of the title compound as a white foam. The HCl saltwas generated from EtOAc to give a white solid: mp decomposes above 190°C.

Elemental analysis for C₂₆H₃₁N₅.2HCl.H₂O; Calc'd: C, 61.90; H, 6.99; N,13.88; Found: C, 62.26; H, 7.18; N, 13.46.

EXAMPLE 55b4-{4-[(1,4-trans)-4-(1H-Indol-3-yl)cyclohexyl]piperazin-1-yl}-2-methyl-1H-benzimidazole

The trans isomer was isolated at the same time affording 110 mg (17%) asa white solid. The HCl salt was generated from EtOH/Et₂O to give a whitesolid: mp decomposes above 220° C.

Elemental Analysis for C₂₅H₂₉N₅.2HCl.1.5H₂O; Calc'd: C, 60.81; H, 7.07;N, 13.64; Found: C, 60.84; H, 7.04; N, 13.31.

EXAMPLE 563-{4-[(1,4-cis)-4-(6-Methoxyquinolin-5-yl)piperazin-1-ylcyclohexyl}-1H-indole-5-carbonitrile

To an oven-dried 100 mL flask under N₂ atmosphere was added5-bromo-6-methoxyquinoline (3 g, 12.6 mmol), piperazine (6.5 g. 75.6mmol), Pd(dba)₂ (570 mg, 5 mol %), P(t-Bu)₃ (0.628 mL, 5 mol %) andsodium t-butoxide (1.82 g, 18.9 mmol). 50 mL dry o-xylene was added andthe reaction mixture stirred and heated at 120° C. for 3 hours, then atroom temperature overnight. The reaction mixture was poured into H₂O(100 mL) and extracted into EtOAc (3×100 mL). The organic fractions werecombined, dried over Na₂SO₄, concentrated and purified by columnchromatography (10% MeOH/CH₂Cl₂+NH₄OH) affording 170 mg (6%) of6-methoxy-5-piperazin-1-yl-quinoline. This material was used withoutfurther purification (combined with another batch) in the next step.(Ref: Tet Lett. 1998, 39, p. 617-620).

To a solution of 6-methoxy-5-piperazin-1-yl-quinoline (220 mg, 0.9mmol), 4-(5-cyano-1H-3-indolyl)-cyclohexanone (215 mg, 0.9 mmol), andsodium triacetoxyborohydride (288 mg, 1.36 mmol) in dichloroethane (20mL) was added acetic acid (0.10 mL, 1.75 mmol) and stirred overnight atroom temperature. The reaction was quenched with 2.5 M NaOH (20 mL) andH₂O (150 mL) then extracted in CH₂Cl₂ (2×100 mL) and 5% MeOH/EtOAc(3×100 mL). The organic fractions were combined, dried over Na₂SO₄,concentrated, filtered and chromatographed (5% MeOH/EtOAc) yielding 140mg (33%) of the cis isomer as a yellow glass. The HCl salt was generatedfrom EtOAc yielding a yellow solid: mp discolors above 85° C.

Elemental analysis for C₂₆H₃₁N₅.3HCl.H₂O; Calc'd: C, 58.74; H, 6.12; N,11.81; Found: C, 58.67; H, 6.34; N, 11.47.

EXAMPLE 572-{4-(1,4-trans)-[4-(6-Bromoquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 6-bromo-8-piperazin-1-yl-quinoline (1 g, 3.4 mmol),4-(5-cyano-1-methyl-1H-3-indolyl)-cyclohexanone (857 mg, 3.4 mmol), andsodium triacetoxyborohydride (1.08 g, 5.1 mmol) in dichloroethane (40mL) was added acetic acid (0.40 mL, 6.8 mmol) and stirred overnight atroom temperature. The reaction was quenched with 2.5 M NaOH (20 mL) andH₂O (150 mL) then extracted in CH₂Cl₂ (2×100 mL) and 5% MeOH/EtOAc(3×100 mL). The organic fractions were combined, dried over Na₂SO₄,concentrated, filtered and chromatographed (5% MeOH/EtOAc) yielding 360mg (20%) of the trans isomer as a white foam. The HCl salt was generatedfrom EtOAc to give a white solid: mp decomposes above 85° C.

Elemental analysis for C₂₉H₂ ₀BrN₅.HCl.0.75H₂O; Calc'd: C, 60.21; H,5.66; N, 12.11; Found: C, 60.17; H, 5.44; N, 11.99.

EXAMPLE 58a(cis)-6-Bromo-8-{4-[4-(5-fluoro-1-methyl-1H-indol-3-yl)cyclohexyl]piperazin-1-yl}quinoline

To a solution of 6-bromo-8-piperazin-1-yl-quinoline (610 mg, 2.09 mmol),4-(5-fluoro-1-methyl-1H-indol-3-yl)-cyclohexanone (510 mg, 2.09 mmol),and sodium triacetoxyborohydride (660 mg, 3.14 mmol) in dichloroethane(40 mL) was added acetic acid (0.24 mL, 4.18 mmol) and stirred overnightat room temperature. The reaction was quenched with 1 M NaOH (50 mL) andH₂O (100 mL) then extracted in CH₂Cl₂ (100 mL) and EtOAc (100 mL). Theorganic fractions were combined, dried over Na₂SO₄, concentrated,filtered and chromatographed (5% MeOH/EtOAc). The majority of the ciscompound precipitated out of 5% MeOH/EtOAc before application to thecolumn and was purified by filtration affording 510 mg (47%) of the cisisomer as a pale yellow solid: mp 215-217° C.

Elemental analysis for C₂₈H₃₀BrFN₄.0.5H₂O; Calc'd: C, 60.21; H, 5.66; N,12.11; Found: C, 60.17; H, 5.44; N, 11.99.

EXAMPLE 58b(trans)-6-Bromo-8-{4-[4-(5-fluoro-1-methyl-1H-indol-3-yl)cyclohexyl]piperazin-1-yl}quinoline

The trans isomer was isolated by chromatography affording 210 mg (19%)as a pale yellow foam. The HCl salt was generated from EtOAc to give agray solid: mp decomposes above 225° C.

Elemental analysis for C₂₈H₃₀BrFN₄HCl.0.5H₂O; Calc'd: C, 59.32; H, 5.69;N, 9.88; Found: C, 59.36; H, 5.47; N, 9.79.

EXAMPLE 59a3-{4-(1,4-cis)-4-(6-Ethoxyquinolin-8-yl)piperazine-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 6-ethoxy-8-piperazin-1-yl-quinoline (500 mg, 1.95mmol), 4-(5-cyano-1-methyl-1H-indol-3-yl)-cyclohexanone (490 mg, 1.95mmol), and sodium triacetoxyborohydride (620 mg, 2.93 mmol) indichloroethane (40 mL) was added acetic acid (0.25 mL, 3.9 mmol) andstirred overnight at room temperature. The reaction was quenched with 1M NaOH (100 mL) and H₂O (50 mL) then extracted in CH₂Cl₂ (50 mL) and 5%MeOH/EtOAc (2×100 mL). The organic fractions were combined, dried overNa₂SO₄, concentrated, filtered and chromatographed (5% MeOH/EtOAc). Themajority of the cis compound precipitated out of 5% MeOH/EtOAc beforeapplication to the column and was purified by filtration and combinedwith the column fractions affording 450 mg (47%) of the cis isomer as anoff-white solid: mp decomposes above 215° C.

Elemental analysis for C₃₁H₃₅N₅O.1.25H₂O; Calc'd: C, 72.14; H, 7.32; N,13.57; Found: C, 72.23; H, 7.06; N, 13.35.

EXAMPLE 59b3-{4-(1,4-trans)-4-(6-Ethoxyquinolin-8-yl)piperazine-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time by chromatographyaffording 210 mg (22%) as a yellow foam which was triturated with Et₂Oto afford a pale yellow solid: mp 225-228° C.

Elemental Analysis for C₃₁H₃₅N₅O.H₂O; Calc'd: C, 72.77; H, 7.29; N,13.69; Found: C, 72.79; H, 7.07; N, 13.41.

EXAMPLE 603-[4-(4-{6-[Benzyl(methyl)amino]quinolin-8-yl}piperazin-1-yl)cyclohexyl]-1-methyl-1H-indole-5-carbonitrile

To an oven-dried 10 mL round bottom flask under a N₂ atmosphere wasadded Cs₂CO₃ (173 mg, 0.53 mmol), BINAP (15 mg, 3 mol %), Pd(OAc)₃ (5mg, 3 mol %) and2-{4-(1,4-trans)-[4-(6-bromoquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile(200 mg, 0.38 mmol). Toluene (1 mL) and benzylmethylamine (0.06 mL, 0.45mmol) were added via syringe, and the reaction mixture was heated at100° C. overnight. The cooled reaction mixture was diluted with Et₂O (15mL), filtered to remove solids, and concentrated. The resulting oil waspurified by column chromatography (5%MeOH/EtOAc+NH₄OH) to give 60 mg ofthe title compound as a brown solid. The HCl salt was generated fromEtOAc/Et₂O affording an orange solid: mp decomposes above 90° C.

Elemental analysis for C₃₁H₄ON₆.3HCl; Calc'd: C, 65.53; H, 6.39; N,12.39; Found: C, 65.36; H, 6.71; N, 12.39.

EXAMPLE 61a1-Methyl-3-[(1,4-cis)-4-(4-quinolin-5-ylpiperazin-1-yl)cyclohexyl]-1H-indole-5-carbonitrile

To a solution of 5-piperazin-1-yl-quinoline (300 mg, 1.4 mmol),4-(5-cyano-1-methyl-1H-indol-3-yl)-cyclohexanone (350 mg, 1.4 mmol), andsodium triacetoxyborohydride (450 mg, 2.1 mmol) in dichloroethane (40mL) was added acetic acid (0.2 mL, 3.4 mmol) and stirred overnight atroom temperature. The reaction was quenched with 1 M NaOH (25 mL) andH₂O (100 mL) then extracted into CH₂Cl₂ (100 mL) and EtOAc (2×100 mL).The organic fractions were combined, dried over Na₂SO₄, concentrated,filtered and chromatographed (5% MeOH/EtOAc) affording 190 mg (30%) ofthe cis isomer as a white foam. The HCl salt was generated from EtOAc togive a white solid: mp decomposes above 235° C.

Elemental analysis for C₂₉H₃₁N₅.HCl.0.5H₂O; Calc'd: C, 70.36; H, 6.72;N, 14.15; Found: C, 70.43; H, 6.57; N, 13.83.

EXAMPLE 61b1-Methyl-3-[(1,4-trans)-4-(4-quinolin-5-ylpiperazin-1-yl)cyclohexyl]-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time affording 140 mg (22%) asa pale yellow solid: mp discolors above 200° C.

Elemental analysis for C₂₉H₃₁N₅.0.5H₂O; Calc'd: C, 75.95; H, 7.03; N,15.27; Found: C, 75.82; H, 6.72; N, 15.09.

EXAMPLE 62a3-{(1,4-cis)-4-[4-(6-Methoxy-1,2,3,4-tetrahydroquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 6-methoxy-5-piperazin-1-yl-1,2,3,4-tetrahydroquinoline(300 mg, 1.2 mmol), 4-(5-cyano-1-methyl-1H-indol-3-yl)-cyclohexanone(306 mg, 1.2 mmol), and sodium triacetoxyborohydride (254 mg, 1.8 mmol)in dichloroethane (50 mL) was added acetic acid (0.15 mL, 2.4 mmol) andstirred overnight at room temperature. The reaction was quenched with 1M NaOH (50 mL) and H₂O (50 mL) then extracted in CH₂Cl₂ (100 mL) andEtOAc (2×100 mL). The organic fractions were combined, dried overNa₂SO₄, concentrated, filtered and chromatographed twice (5% MeOH/EtOAc)affording 140 mg (24%) of the cis isomer as a white foam. The HCl saltwas generated from EtOAc to give a white solid: mp decomposes above 170°C.

Elemental analysis for C₃₀H₃₇N₅O.HCl.H₂O; Calc'd: C, 66.96; H, 7.49; N,13.01; Found: C, 66.71; H, 7.28; N, 12.50.

EXAMPLE 62b3-{(1,4-trans)-4-[4-(6-Methoxy-1,2,3,4-tetrahydroquinolin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time affording 80 mg (22%) asa white foam. The HCl salt was generated from EtOAc affording a whitesolid: mp decomposes above 225° C.

Elemental analysis for C₃₀H₃₇N₅O.HCl.0.5H₂O; Calc'd: C, 68.10; H. 7.43;N, 13.24; Found: C, 68.17; H, 7.30; N, 13.17.

EXAMPLE 63a1-Methyl-3-[(1,4-cis)-4-(4-[1,6]naphthyridine-8-ylpiperazin-1-yl)cyclohexyl]-1H-indole-5-carbonitrile

To a solution of 8-piperazin-1-yl-naphthyridine (470 mg, 2.19 mmol),4-(5-cyano-1-methyl-1H-indol-3-yl)-cyclohexanone (550 mg, 2.19 mmol),and sodium triacetoxyborohydride (700 mg, 3.28 mmol) in dichloroethane(40 mL) was added acetic acid (0.25 mL, 4.38 mmol) and stirred overnightat room temperature. The reaction was quenched with 1 M NaOH (40 mL) andH₂O (20 mL) then extracted in CH₂Cl₂ (50 mL) and EtOAc (2×100 mL). Theorganic fractions were combined, dried over Na₂SO₄, concentrated,filtered and chromatographed three times (5% MeOH/EtOAc) affording 490mg (50%) of the cis isomer as a pale yellow solid: mp decomposes above215° C., then melts 227-230° C.

Elemental analysis for C₂₈H₃₀N₆0.5H₂O; Calc'd: C, 73.90; H, 6.76; N,18.47; Found: C, 73.90; H, 6.76; N, 18.61.

EXAMPLE 63b1-Methyl-3-[(1,4-trans)-4-(4-[1,6]naphthyridine-8-yl-piperazin-1-yl)cyclohexyl]-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time affording 120 mg (12%) asa pale yellow solid: mp decomposes above 195° C.

Elemental analysis for C₃₀H₃₇N₅O.0.5H₂O ; Calc'd: C, 73.90; H, 6.76; N,18.47; Found: C, 73.87; H, 6.75; N, 18.66.

EXAMPLE 641-Methyl-3-((1,4-cis)-4-{4-[6-(methylamino)quinolin-8-yl]piperazin-1-yl}cyclohexyl)-1H-indole-5-carbonitrile

To a solution of 6-(methylamino)-8-piperazin-1-yl-quinoline (100 mg,0.43 mmol), 4-(5-cyano-1-methyl-1H-indol-3-yl)-cyclohexanone (100 mg,0.43 mmol), and sodium triacetoxyborohydride (130 mg, 0.62 mmol) indichloroethane (30 mL) was added acetic acid (0.1 mL, 0.86 mmol) andstirred overnight at room temperature. The reaction was quenched with 1M NaOH (50 mL) and H₂O (50 mL) then extracted in CH₂Cl₂ (100 mL) andEtOAc (2×100 mL). The organic fractions were combined, dried overNa₂SO₄, concentrated, filtered and chromatographed (10% MeO/EtOAc)affording 60 mg (30%) of the cis isomer as a gold oil. The HCl salt wasgenerated from EtOAc affording a yellow solid: mp decomposes above 170°C.

Elemental analysis for C₃₀H₃₄N₆.HCl.H₂O; Calc'd: C, 67.59; H, 7.00; N,15.76; Found: C, 67.58; H, 6.86; N, 15.65.

EXAMPLE 65a(cis)-3-{4-[4-(7-Methoxyquinolin-5-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 7-methoxy-5-piperazin-1-yl-quinoxaline (160 mg, 0.66mmol), 4-(5-cyano-1-methyl-1H-indol-3-yl)-cyclohexanone (170 mg, 0.66mmol), and sodium triacetoxyborohydride (210 mg, 0.98 mmol) indichloroethane (30 mL) was added acetic acid (0.1 mL, 1.3 mmol) andstirred overnight at room temperature. The reaction was quenched with 1M NaOH (100 mL) then extracted in CH₂Cl₂ (75 mL) and EtOAc (100 mL). Theorganic fractions were combined, dried over Na₂SO₄, concentrated,filtered and chromatographed (5% MeOH/EtOAc) affording 120 mg (38%) ofthe cis isomer as a bright yellow solid: mp 226-229° C.

Elemental analysis for C₂₉H₃₂N₆O.H₂O; Calc'd: C, 69.86; H, 6.87; N,16.85; Found: C, 69.94; H, 6.71; N, 16.60.

EXAMPLE 65b(trans)-3-{4-[4-(7-Methoxyquinoxalin-5-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time affording 80 mg (12%) asa yellow solid: mp 230-233° C.

Elemental analysis for C₂₉H₃₂N₆O.0.5H₂O; Calc'd: C, 71.14; H, 6.79; N,17.16; Found: C, 71.29; H, 6.69; N, 17.16.

EXAMPLE 66a(cis)-3-{4-[4-(6-Methoxy[1,7]naphthyridin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 6-methoxy-8-piperazin-1-yl-[1,7]naphthyridine (250 mg,1.02 mmol), 4-(5-cyano-1-methyl-1H-indol-3-yl)-cyclohexanone (260 mg,1.02 mmol), and sodium triacetoxyborohydride (320 mg, 1.53 mmol) indichloroethane (50 mL) was added acetic acid (0.12 mL, 2.04 mmol) andstirred overnight at room temperature. The reaction was quenched with 1M NaOH (50 mL) then extracted in CH₂Cl₂ (1×50 mL) and EtOAc (75 mL). Theorganic fractions were combined, dried over Na₂SO₄, concentrated,filtered and chromatographed (5% MeOH/EtOAc+NH₄OH) affording 160 mg(33%) of the cis isomer as a yellow foam. The HCl salt was generatedform EtOAc affording a pale yellow solid: mp 235-238° C.

Elemental analysis for C₂₉H₃₂N₆O.HCl.H₂O; Calc'd: C, 65.10; H. 6.59; N,15.71; Found: C, 65.09; H, 6.77; N, 15.60.

EXAMPLE 66b(cis)-3-{4-[4-(6-Methoxy[1,7]naphthyridin-8-yl)piperazin-1-yl]cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time affording 90 mg (18%) asa yellow foam. The HCl salt was generated from EtOAc affording a paleyellow solid: mp 230-233° C.

Elemental analysis for C₂₉H₃₂N₆O.HCl.0.5H₂O; Calc'd: C, 66.21; H, 6.51;N, 15.97; Found: C, 66.26; H, 6.37; N, 15.91.

EXAMPLE 67a3-{(1,4-cis)4-[4-(2-Oxo-2,3-dihydro-1H-benzimidoazol-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

To a solution of 4-piperazin-1-yl-1,3-dihydro-benzoimidazol-2-one (400mg, 1.8 mmol), 4-(5-cyano-1H-indol-3-yl)-cyclohexanone (430 mg, 1.8mmol), and sodium triacetoxyborohydride (590 mg, 2.8 mmol) indichloroethane (50 mL) was added acetic acid (0.21 mL, 3.7 mmol) andstirred overnight at room temperature. The reaction was quenched with2.5 M NaOH (100 mL) then extracted in MeOH/CH₂Cl₂ (2×100 mL). Theorganic fractions were combined, dried over Na₂SO₄, concentrated,filtered and chromatographed two times (10% MeOH/EtOAc) affording 185 mg(23%) of the cis isomer as a beige solid. The HCl salt was generatedform EtOAc affording an off-white solid: mp decomposes above 235° C.

Elemental analysis for C₂₆H₂₈N₆O.HCl.1.5H₂O; Calc'd: C, 61.96; H, 6.40;N, 16.67; Found: C, 61.97; H, 6.26; N, 16.28.

EXAMPLE 67b3-{(1,4-trans)4-[4-(2-Oxo-2,3-dihydro-1H-benzimidoazol-4-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time affording 90 mg (18%) asa white solid. The HCl salt was generated from EtOAc affording a whitesolid: mp decomposes above 265° C.

Elemental analysis for C₂₆H₂₈N₆O.HCl.1.5H₂O; Calc'd: C, 61.96; H, 6.40;N, 16.67; Found: C, 61.98; H, 6.25; N, 16.38.

EXAMPLE 68a3-[cis-4-[4-(6-Methoxy-1H-dinole-4-yl)-1-piperazinyl]cyclohexyl]1H-indole-5-carbonitrile

A solution of 4-(5-cyano-1-methyl-3-indolyl)-cyclohexanone (0.43 g, 1.8mmol), 6-methoxy-4-piperazin-1-yl-1H-indole (0.4 g, 1.8 mmol), sodiumtriacetoxyborohydride (0.77 g, 2.7 mmol) and acetic acid (0.21 mL, 3.6mmol) in 1,2-dichloroethane (20 mL) was allowed to stir at roomtemperature overnight. The reaction was quenched with 1 N aqueous sodiumhydroxide (10 mL), and extracted with methylene chloride (3×50 mL). Thecombined organic layers were washed with brine (2×50 mL), then driedover anhydrous sodium sulfate and filtered. Chromatography (5%methanol/ethyl acetate) afforded 0.38 g (48%) of the title compound as awhite solid: mp 182-185° C.

The HCl salt was prepared in ethyl acetate: mp 225-226° C.

Elemental analysis for C₂₈H₃₁N₅O.2HCl.0.25H₂O.0.40C₄H₈O₂; Calc'd: C,62.79; H, 6.53; N, 12.37; Found: C, 62.28; H, 6.44; N, 12.97.

EXAMPLE 68b3-[trans-4-[4-(6-Methoxy-1H-indole-4-yl)-1-piperazinyl]cyclohexyl]1H-indole-5-carbonitrile

The trans compound was isolated at same time as the cis isomer in 33%yield (0.26 g) as a white solid: mp 157-160° C. The HCl salt wasprepared in ethyl acetate: mp>210° C.

Elemental analysis for C₂₈H₃₁N₅O.HCl.1.5H₂O; Calc'd: C, 64.82; H, 6.58;N, 13.94; Found: C, 65.04; H, 6.82; N, 13.54.

EXAMPLE 695-Fluoro-3-{4-[4-(6-Methoxy-naphthalen-2-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole

To 400 mg (1.66 mmol) of 1-(6-methoxy-naphthalen-2-yl)-piperazine in 40mL of CH₂Cl₂ and 100 mg of glacial HOAc at 23° C. was added 384 mg (1.66mmol) of 4-(5-fluoro-1H-indol-3-yl)-cyclohex-3-enone followed by 216 mg,(1.89 mmol) of Na(OAc)₃BH. After stirring at 23° C. for 12 hours, thereaction mixture was transferred to a separatory funnel and partitionedbetween water and CH₂Cl₂. The organics were washed with brine, driedover MgSO₄, and chromatographed on silica gel eluting with 20:1 EtOAc:2M NH, in MeOH. The product fractions were pooled, stripped, and treatedwith 115 mg (1.3 mmol) of (CO₂H)₂ in absolute EtOH to give 640 mg (1.40mmol, an 84% yield) of the oxalate salt of the title compound as a whitecrystalline solid. mp: 200-203° C.; MS (ES) m/z 458 (M)⁺.

Elemental Analysis for C₂₉H₃₂FN₃O; Calc'd.: C, 67.95; H, 6.25, N, 7.67.Found: C, 66.64; H, 6.71; N, 7.11.

EXAMPLE 70a3-[4-[(cis)-4-(6-[1,3]Dioxolan-2-yl-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl-1H-indole-5-carbonitrile

6-[1,3]Dioxolan-2-yl-8-piperazinyl-quinoline 1.36 g (4.8 mmol) wascombined with 1-methyl-3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrile,1.53 g (7.2 mmol), 0.43 g (7.2 mmol) CH₃CO₂H, and 100 mL CH₂Cl₂ by theprocess described for Example 1. The crude was chromatographed on silicagel in a gradient of CH₂Cl₂ to 10:1 CH₂Cl₂:MeOH, and the cis compoundwas isolated, (R_(f)=0.39, 10:1 CH₂Cl₂:MeOH). The product fractions werepooled, stripped, and treated with 0.09 g (1.0 mmol) (CO₂H)₂ in absoluteEtOH to give 1.0 g (1.9 mmol, a 40% yield) of the oxalate salt of thecis isomer of the title compound as a yellow crystalline solid. mp: 105°C.; MS (ES) m/z 522 (MH)⁺.

Elemental Analysis for C₃₂H₃₅N₅O₂; Calc'd.: C, 73.68; H, 6.76, N, 13.43.Found: C, 73.67; H, 6.82; N, 13.23.

EXAMPLE 70b3-[4-[(trans)-4-(6-[1,3]Dioxolan-2-yl-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl-1H-indole-5-carbonitrile

The trans compound was also obtained, (R_(f)=0.24, 10:1 CH₂Cl₂:MeOH).The product fractions were pooled, stripped, and treated with 0.07 g(0.8 mmol) of (CO₂H)₂ in absolute EtOH to give 0.80 g (1.5 mmol, a 31%yield) mp: 160° C.; MS ES m/z 522 (MH)⁺.

Elemental Analysis for C₃₂H₃₅N₅O₂; Calc'd.: C, 73.68; H, 6.76, N, 13.43.Found: C, 67.05; H, 6.27; N, 12.03.

EXAMPLE 718-[4-[(cis)-4-(5-Cyano-1-methyl-1H-indole-3-yl)-cyclohexyl]-piperazin-1-yl]-6-quinolinecarbaldehyde

To 920 mg (1.8 mmol) of3-[4-[(cis)-4-(6-[1,3]dioxolan-2-yl-quinolin-8-yl)-piperazinyl]cyclohexyl-1H-indole-5-carbonitrilein 7 mL of THF and 14 mL of glacial HOAc at 23° C. was added 0.8 ml of6N HCl. The reaction was heated at 40° C. for 5 hours. The volatileswere removed by rotary evaporation and the aqueous was neutralized with5 N NaOH. The organics were extracted into CH₂Cl₂ and washed with brine,dried over MgSO₄, and chromatographed on silica gel eluting with 10:1CH₂Cl₂:MeOH.). The product fractions were pooled, stripped, and treatedwith 147 mg (1.6 mmol) (CO₂H)₂ in absolute EtOH to give 780 mg (1.3mmol, a 72% yield) oxalate salt of the title compound as a pale yellowcrystalline solid. mp: 172-174° C.; MS (ES) m/z 478 (MH)³⁰ .

Elemental Analysis for C₃₀H₃₁N₅O; Calc'd.: C, 75.44; H, 6.54, N, 14.66.Found: C, 73.27; H, 6.66; N, 13.98.

EXAMPLE 728-[4-[(trans)-4-(5-Cyano-1-methyl-1H-indole-3-yl)-cyclohexyl]-piperazin-1-yl]-6-quinolinecarbaldehyde

The trans compound was obtained by the process described for Example 4by combining 0.750 mg (1.4 mmol)3-[4-[(trans)-4-(6-[1,3]dioxolan-2-yl-quinolin-8-yl)-piperazinyl]cyclohexyl-1H-indole-5-carbonitrile,0.6 ml 6N HCl, 7 ml THF, 7 ml glacial HOAc. The product fractions werepooled, striped, and treated with 85 mg (0.9 mmol) (CO₂H)₂ in absoluteEtOH to give 450 mg (0.76 mmol, a 42% yield) Mp: 201-203° C.; MS (ES m/z478 (H)⁺.

Elemental Analysis for C₃₀H₃₁N₅O; Calc'd.: C, 75.44; H, 6.54, N, 14.66.Found: C, 72.10; H, 6.80; N, 12.64.

EXAMPLE 738-[4-[(cis)-4-(5-Cyano-1-methyl-1H-indole-3-yl)cyclohexyl]-1-piperazinyl]-6-quinolinecarboxylicAcid

To 750 mg (1.6 mmol) of8-[4-[(cis)-4-(5-cyano-1-methyl-1H-indole-3-yl)cyclohexyl]-1-piperazinyl]-6-quinolinecarbaldehydein 60 mL of t-BuOH and 8 mL of CH₃CHC(CH₃)₂ at 23° C. was added asolution of 1.3 mg (14.4 mmol) NaClO₂, 1.3 g (10.8 mmol) NaH₂PO₄ in 3 mlwater. After stirring at 23° C. for 12 hours, the volatiles were removedby rotary evaporation. The reaction mixture was transferred to aseparatory funnel and partitioned between water and CH₂Cl₂. The organicswere washed with brine, dried over MsSO₄, and chromatographed on silicagel eluting with 20:1 CH₂Cl₂:MeOH containing 5% glacial HOAc. Theproduct fractions were pooled, stripped, and treated with 75 mg (0.83mmol) of (CO₂H)₂ in absolute EtOH to give 390 mg (0.6 mmol, a 38% yield)of the oxalate salt of the title compound as a tan crystalline solid.mp: 230° C.; MS (ES) m/z: 494 (MH)⁺.

Elemental Analysis for C₃₀H₃₁N₅O₂; Calc'd.: C, 73.00; H, 6.33, N, 14.19.Found: C, 50.91; H, 4.92; N, 7.70.

EXAMPLE 748-[4-[(trans)-4-(5-Cyano-1-methyl-1H-indole-3-yl)cyclohexyl]-1-piperazinyl]-6-quinolinecarboxylicAcid

The trans was obtained by the process described for Example 73 bycombining 0.30 g (0.60 mmol)8-[4-[(Trans)-4-(5-cyano-1-methyl-1H-indole-3-yl)cyclohexyl]-1-piperazinyl]-6-quinolinecarbaldehyde,0.48 g (5.5 mmol) NaClO₂, 0.48 g (4.1mmol) NaH₂PO₄, 24 mL t-BuOH, 3 mLCH₃CHC(CH₃)₂, and 6 ml water. The product fractions were pooled,striped, and treated with 54 mg (0.60 mmol) of (CO₂H)₂ in absolute EtOHto give 97mg (0.16 mmol, a 10% yield) mp: 275° C. MS (ES) m/z: 494(MH)⁺.

Elemental Analysis for C₃₀H₃₁N₅O Calc'd.: C, 75.44; H, 6.54, N, 14.66.

Found: C, 50.42; H, 4.66; N, 8.82.

EXAMPLE 75 Methyl8-[4-[(cis)-4-(5-cyano-1-methyl-1H-indol-3-yl)cyclohexyl]-1-piperazinyl]-6-quinolinecarboxylate

To 50 mg (0.1 mmol) of8-[4-[(cis)-4-(5-cyano-1-methyl-1H-indole-3-yl)cyclohexyl]-1-piperazinyl]-6-quinolinecarboxylicacid in 1 mL of MeOH and 3 mL of C₆H₅CH₃ at 23° C. was added 0.9 mL(0.39 mmol) of a 10% solution of (CH₂)₃SiCHN₂ in hexanes. After stirringat 23° C. for 12 hours, the volatiles were removed by rotaryevaporation. The crude product was chromatographed on silica gel elutingwith 20:1 CH₂Cl₂:MeOH. The product fractions were pooled, stripped, andtreated with 5 mg (0.05 mmol) of (CO₂H)₂ in absolute EtOH to give 20 mg(0.04 mmol, a 40% yield) of the oxalate salt of the title compound as atan crystalline solid. mp: 153-155° C.; MS (ES) m/z: 599 (MH)⁺.

Elemental Analysis for C₃₁H₃₃N₅O₂; Calc'd.: C, 66.28; H, 5.90, N, 11.71.Found: C, 61.49; H, 5.85; N, 10.35.

EXAMPLE 76a3-[4-[(cis)-4-(7-Methoxy-8-quinolinyl)-1-piperazinyl]cyclohexyl]-1-methyl-1H-indole-5-carbonitrile

7-Methoxy-8-(1-piperazinyl)quinoline 400 mg (1.6 mmol) was combined with404 mg (1.6 mmol) of1-methyl-3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrile, 510 mg (2.4mmol) of Na(OAc)₃BH, 143 mg (2.4 mmol) of glacial HOAc, in 30 mL CH₂Cl₂by the process described for Example 69. The crude was chromatographedon silica gel eluting with 20:1 CH₂Cl₂:MeOH, the cis compound wasisolated (R_(f)=0.34, 10:1 EtOAc:MeOH). The product fractions werepooled, stripped, and treated with 27 mg (0.30 mmol) of (CO₂H)₂ inabsolute EtOH to give 179 mg (0.37 mmol, a 23% yield) of the oxalatesalt of the title compound as a yellow crystalline solid. mp: 183-186°C.; MS (ES) m/z: 480 (MH)⁺.

Elemental Analysis for C₃₀H₃₃N₅O; Calc'd.: C, 67.43; H, 6.19, N, 12.29.Found: C, 65.38; H, 6.34; N, 11.83.

EXAMPLE 76b3-[4-[(trans)-4-(7-Methoxy-8-quinolinyl)-1-piperazinyl]cyclohexyl]-1-methyl-1H-indole-5-carbonitrile

The trans compound was obtained at the same time (R_(f)=0.17, 10:1EtOAc:MeOH). The product fractions were pooled, stripped, and treatedwith 12 mg (0.13 mmol) of (CO₂H)₂ in absolute EtOH to give 80 mg (0.17mmol, an 11% yield) mp: 144-148° C.; MS (ES) m/z: 480 (MH)⁺.

Elemental Analysis for C₃₀H₃₃N₅O; Calc'd.: C, 67.43; H, 6.19, N, 12.29.Found: C, 64.17; H, 6.37; N, 11.68.

EXAMPLE 77a8-[4-[(cis)-4-(5-Cyano-1-methyl-1H-indol-3-yl)cyclohexyl]-1-piperazinyl]-N,N-dimethyl-6-quinolincarboxamide

N,N-dimethyl-8-(1-piperazinyl)-6-quinolinecarboxamide 300 mg (1.1 mmol)was combined with 267 mg (1.1 mmol) of1-methyl-3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrile, 339 mg (1.6mmol) of Na(OAc)₃BH, 96 mg (1.6 mmol) of glacial HOAc in 20 mL CH₂Cl₂ bythe process described for Example 69. The crude product waschromatographed on silica gel with a gradient of EtOAc to 10:1EtOAc:MeOH, and the cis compound was isolated (R_(f)=0.43, 10:1 EtOAc:2M NH₃ in MeOH). The product fractions were pooled, striped, and treatedwith 35 mg (0.39 mmol) of (CO₂H)₂ in absolute EtOH to give 210 mg (0.40mmol, a 36% yield) of the oxalate salt of the title compound as a paleyellow crystalline solid. mp: 163-165° C.; MS (ES) m/z: 521 (MH)⁺.

Elemental Analysis for C₃₂H₃₆N₆O; Calc'd.: C, 66.83; H, 6.27, N, 13.75.Found: C, 59.62; H, 6.15; N, 11.33.

EXAMPLE 77b8-[4-[(trans)-4-(5-Cyano-1-methyl-1H-indol-3-yl)cyclohexyl]-1-piperazinyl]-N,N-dimethyl-6-quinolincarboxamide

The trans compound was obtained at the same time, (R_(f)=0.33, 10:1EtOAc:2M NH₃ in MeOH). The product fractions were pooled, striped, andtreated with 15 mg (0.17 mmol) of (CO₂H)₂ in absolute EtOH to give 80 mg(0.15 mmol, a 14% yield) mp: 160-163° C.; MS (ES) m/z: 521 (MH)⁺.

Elemental Analysis for C₃₂H₃₆N₆O; Calc'd.: C, 66.83; H, 6.27, N, 13.75.Found: C, 62.7; H, 6.52; N, 12.33.

EXAMPLE 786-Methoxy-8-{cis-4-[4-(1H-pyrrolo[2,3-b]pyridin-3-yl)cyclohexyl]-1-piperazinyl}quinoline

To a stirred solution of 195 mg (0.80 mmol) of6-methoxy-8-(1-piperazinyl)quinoline in 10 mL of 1,2-dichloroethane at23° C. was added 177.9 mg (0.83 mmol) of4-(1H-pyrrolo[2,3-b]pyridin-3-yl)cyclohexanone, 254 mg (1.2 mmol) ofsodium triacetoxyborohydride, and 78 mg (1.3 mmol) of glacial aceticacid. The reaction was monitored by TLC on a silica gel plate elutedwith CH₂Cl₂/MeOH (10:1). After stirring at 23° C. for 64 hours, thereaction was quenched with 10 mL of 1 N NaOH, and extracted with CH₂Cl₂(2×25 mL). The aqueous layer was adjusted to pH 10 with AcOH, andfurther extracted with CH₂Cl₂ (2×75 mL). The combined organic layerswere washed with brine (2×75 mL), dried over MgSO₄, filtered, andevaporated to a tan solid.

The crude product was purified by flash chromatography on silica gelusing a gradient elution of CH₂Cl₂/MeOH (40:1 to 10:1 to 4:1). Theappropriate fractions were combined and evaporated to afford 94.8 mg(0.21 mmol, a 27% yield) of the title compound as a tan crystallinesolid.

The oxalate salt of the title compound was prepared by adding 19 mg(0.21 mmol) of oxalic acid to 92 mg (0.21 mmol) of the title compound in1 mL of ethanol at 23° C. After stirring at 23° C. for 64 hours, a solidprecipitated out of solution. Diethyl ether (5 mL) was added to thesuspension and cooled to 0° C., to further crystallize the product. Theprecipitated solid was collected and washed with ether to afford 79.5 mg(15 mmol, a 71% yield) of the oxalate salt. mp: 216-220° C.; MS (ES)m/z: 442.3 (MH)⁺, 221.6 (M/2+H)⁺.

Elemental Analysis For C₂₉H₃₃N₅O₅; Calc'd.: C, 65.48; H, 6.25; N, 13.17.Found: C, 62.66; H, 5.95; N, 11.67.

EXAMPLE 796-Methoxy-8-{cis-4-[4-(1-methyl-1H-pyrrolo[2,3-b]pyridin-3-yl)cyclohexyl]-1-piperazinyl}quinoline

The title compound was prepared by the procedure described in Example 78using 4-(1-methyl-1H-pyrrolo[2,3-b]pyridin-3-yl)-cyclohexanone (204.7mg, 0.89 mmol) in place of4-(1H-pyrrolo[2,3-b]pyridin-3-yl)cyclohexanone. Yield: 30% (108.5 mg,0.24 mmol); viscous yellow oil.

The oxalate salt was prepared in the manner previously described inExample 78 using 108.5 mg (0.24 mmol) of the title compound. Yield: 30%(39.2 mg, 0.072 mmol). mp: 105-110° C.; MS (ES) m/z: 456.3 (MH)⁺, 228.8(M/2+H)⁺.

Elemental Analysis for C₃₀H₃₅N₅O₅; Calc'd.: C, 66.00; H, 6.46; N, 12.83.Found: C, 58.43; H, 6.31; N, 10.57.

EXAMPLE 808-{cis-4-[4-(6-Fluoro-1H-indol-3-yl)cyclohexyl]-1-piperazinyl}-6-methoxyquinoline

The title compound was prepared by the procedure described in Example 78using 4-(6-fluoro-1H-indol-3-yl)-cyclohexanone (401 mg, 1.87 mmol) inplace of 4-(1H-pyrrolo[2,3-b]pyridin-3-yl)cyclohexanone. Yield: 28% (243mg, 0.53 mmol); white crystalline solid.

The oxalate salt was prepared in the manner previously described inExample 78 using 78.0 mg (0.24 mmol) of the title compound. Yield: 66%(61.1 mg, 0.11 mmol) as a white solid. mp: 239-243° C.; MS (ES) m/z:459.3 (MH)⁺, 230.1 (M/2+H).

Elemental Analysis for C₃₀H₃₃FN₄O₅; Calc'd.: C, 65.64; H, 6.06; N,10.21. Found: C, 65.16; H, 6.40; N, 9.86.

EXAMPLE 818-{cis-4-[4-(6-Fluoro-1-methyl-1H-indol-3-yl)cyclohexyl]-1-piperazinyl}-6-methoxyquinoline

The title compound was prepared by the procedure described in Example 78using 4-(6-fluoro-1-methyl-1H-indol-3-yl)-cyclohexanone (230 mg, 0.94mmol) in place of 4-(1H-pyrrolo[2,3-b]pyridin-3-yl)cyclohexanone. Yield:30% (131.6 mg, 0.28 mmol); white crystalline solid.

The oxalate salt was prepared in the manner previously described inExample 78 using 127.9 mg (0.27 mmol) of the title compound. Yield: 20%(30.1 mg, 0.054 mmol). mp: 219-223° C.; MS (ES) m/z: 473.2 (MH)⁺.

Elemental Analysis for C₃₁H₃₅FN₄O₅; Calc'd.: C, 66.14; H, 6.27; N, 9.95.Found: C, 66.26; H, 6.16; N, 7.49.

EXAMPLE 826-Methoxy-8-(4-{(cis)-4-[5-(trifluoromethyl)-1H-indol-3-yl]cyclohexyl}-1-piperazinyl)quinoline

The title compound was prepared by the procedure described in Example 78using cyclohexanone 4-(5-trifluoromethyl-1H-indol-3-yl)-cyclohexanone(271.5 mg, 0.97 mmol) in place of4-(1H-pyrrolo[2,3-b]pyridin-3-yl)cyclohexanone. Yield: 12% (57 mg, 0.12mmol); off-white solid.

The oxalate salt was prepared in the manner previously described inExample 78 using 25.6 mg (0.050 mmol) of the title compound. Yield: 67%(20 mg, 0.033 mmol). mp: 143-147° C.; MS (ES) m/z: 509.4 (MH)⁺.Elemental Analysis for C₃₁H₃₃F₃N₄O₅; Calc'd.: C, 62.17; H, 5.55; N,9.35. Found: C, 57.55; H, 5.84; N, 8.63.

EXAMPLE 83a(cis)-6-Methoxy-8-(4-{4-[1-methyl-5-(trifluoromethyl)-1H-indol-3-yl]cyclohexyl}piperazinyl)quinoline

The title compound was prepared by the procedure described in Example 78using 4-(1-methyl-5-trifluoromethyl-1H-indol-3-yl)-cyclohexanone (750.3mg, 2.54 mmol) in place of4-(1H-pyrrolo[2,3-b]pyridin-3-yl)cyclohexanone. Flash chromatography wasperformed using a gradient elution of ethyl acetate/MeOH (40:1 to 10:1to 4:1) in place of CH₂Cl₂/MeOH; R_(f)=0.36. Yield: 12% (162.1 mg, 0.30mmol); tan solid.

The oxalate salt was prepared in the manner previously described inExample 78 using 93.5 mg (0.18 mmol) of the title compound. Yield: 29%(31.4 mg, 0.051 mmol). mp: 101-104° C.; MS (ES) m/z: 523.2 (MH)⁺.

Elemental Analysis for C₃₂H₃₅F₃N₄O₅; Calc'd.: C, 62.70; H, 5.76; N,9.14. Found: C, 55.43; H, 6.21; N, 7.75.

EXAMPLE 83b(trans)-6-Methoxy-8-(4-{4-[1-methyl-5-(trifluoromethyl)-1H-indol-3-yl]cyclohexyl}piperazinyl)quinoline

The trans compound (R_(f)=0.26) was isolated at the same time as the cisisomer in 11% yield (140 mg, 0.27 mmol) as a tan solid. The oxalate saltwas prepared in the manner previously described in Example 78 using 100mg (0.19 mmol) of the title compound. Yield: 86% (101 mg, 0.16 mmol).mp: 111-115° C.; MS (ES) m/z: 523.3 (MH)⁺.

Elemental Analysis for C₃₂H₃₅F₃N₄O₅; Calc'd.: C, 62.70; H, 5.76; N,9.14. Found: C, 59.47; H, 5.80; N, 7.93.

EXAMPLE 843-{(cis)-4-[4-(6-Methoxy-8-quinolinyl)-1-piperazinyl]cyclohexyl}-1-methyl-1H-carbonitrile

The title compound was prepared in a similar manner described in Example781 using 1-methyl-3-(4-oxo-cyclohexyl)-1H-indole-6-carbonitrile (164mg, 0.69 mmol) in place of4-(1H-pyrrolo[2,3-b]pyridin-3-yl)cyclohexanone. Flash chromatography wasperformed using a gradient elution of ethyl acetate/MeOH (40:1 to 10:1to 4:1) in place of CH₂Cl₂/MeOH. Yield: 20% (80.4 mg, 0.17 mmol); yellowsolid.

The oxalate salt was prepared in the manner previously described inExample 78 using 80.4 mg (0.17 mmol) of the title compound and DMF inplace of EtOH. Yield: 56% (53.4 mg, 0.094 mmol). mp: 111-114° C.; MS(ES) m/z: 480.2 (MH)⁺, 240.7 (M/2+H)⁺.

Elemental Analysis for C₃₂H₃₅N₅O₅; Calc'd.: C, 67.43; H, 6.19; N, 12.29.Found: C, 62.99; H, 5.98; N, 11.16.

EXAMPLE 853-{4-[4-(6-Methoxy-8-quinolinyl)-1-piperazinyl]cyclohexyl}-1H-indole-6-carbonitrile

The title compound was prepared by the procedure described in Example 78using 3-(4-oxo-cyclohexyl)-1H-indole-6-carbonitrile (404.8 mg, 1.7 mmol)in place of 4-(1H-pyrrolo[2,3-b]pyridin-3-yl)cyclohexanone. Flashchromatography was performed using a gradient elution of ethylacetate/MeOH (40:1 to 10:1 to 4:1) in place of CH₂Cl₂ MeOH. Yield: 63%(493.7 mg, 1.06 mmol); tan solid.

The oxalate salt was prepared in the manner previously described inExample 78 using 183.5 mg (0.39 mmol) of title compound and DMF in placeof EtOH. Yield: 43% (93 mg, 0.20 mmol). mp: 242-244° C.; MS (ES) m/z:466.2 (MH)⁺.

Elemental Analysis for C₃₁H₃₃N₅O₅; Calc'd.: C, 66.97; H, 5.98; N, 12.60.Found: C, 67.56; H, 6.09; N, 13.15.

EXAMPLE 86a8-{4-[(1,4-cis)-4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-′yl}-6-methoxy-quinoline

To a solution of 0.270 g of 6-Methoxy, 8-piperazino-quinoline in 20 mLof CH₂Cl₂, was added 0.245 g of4-(5-fluoro-1-methyl-1H-3-indolyl)-cyclohexanone followed by 0.530 g ofsodium triacetoxyborohydride and 0.09 mL acetic acid. The reaction wasstirred at room temperature overnight. It was quenched with 1N NaOH, andthe product was extracted with CH₂Cl₂. The organic phase was washed withwater and dried over magnesium sulfate. The product was filtered through75 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.115 g of thedesired product: mp 216-218° C.; MS (ES) m/z (relative intensity): 473(M⁺+H, 100).

EXAMPLE 86b8-{4-[(1,4-trans)-4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-′yl}-6-methoxy-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.013020 g). mp 198-200° C. MS (ES) m/z (relativeintensity): 473 (M⁺+H, 100).

EXAMPLE 87a8-{4-[4-((1,4-cis)-1H-Indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

To a solution of 0.350 g of 6-Methoxy, 8-piperazino-quinoline in 10 mLof CH₂Cl₂, was added 0.335 g of 4-(1-H-3-indolyl)-cyclohexanone followedby 0.840 g of sodium triacetoxyborohydride and 0.2 mL acetic acid. Thereaction was stirred at room temperature overnight. It was quenched with1N NaOH, and the product was extracted with CH₂Cl₂. The organic phasewas washed with water and dried over magnesium sulfate. The product wasfiltered through 125 mL of silica gel using 50% ethyl acetate/hexanes,75% ethyl acetate/hexanes, and finally 100% ethyl acetate to give 0.041g of the desired product: mp 165-171° C.; MS (ES) m/z (relativeintensity): 441 (M⁺+H, 100).

EXAMPLE 87b8-{4-[4-((1,4-trans)-1H-Indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.023 g). mp 118-122° C. MS (ES) m/z (relativeintensity): 441 (M⁺+H, 100).

EXAMPLE 88a3-{(1,4-cis)-4-[4-(6-Methoxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 0.243 g of 6-Methoxy, 8-piperazino-quinoline in 10 mLof CH₂Cl₂, was added 0.252 g of3-(4-oxo-cyclohexyl)-1-methyl-1H-indole-5-carbonitrile followed by 0.527g of sodium triacetoxyborohydride and 0.2 mL acetic acid. The reactionwas stirred at room temperature overnight. It was quenched with 1N NaOH,and the product was extracted with CH₂Cl₂. The organic phase was washedwith water and dried over magnesium sulfate. The product was filteredthrough 100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.085 g of thedesired product: mp 239-240° C.; MS (ES) m/z (relative intensity): 480(M⁺+H, 100).

EXAMPLE 88b3-{(1,4-trans)-4-[4-(6-Methoxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.029 g). mp 225-228° C. MS (ES) m/z (relativeintensity): 480 (M⁺+H, 100).

EXAMPLE 89a6-Methoxy-8-{4(1,4-cis)-[4-(1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-′yl}-quinoline

To a solution of 0.243 g of 6-Methoxy, 8-piperazino-quinoline in 10 mLof CH₂Cl₂, was added 0.250 g of 4-(1-methyl-1-H-3-indolyl)-cyclohexanonefollowed by 0.527 g of sodium triacetoxyborohydride and 0.2 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 50% ethylacetate/hexanes, 75% ethyl acetate/hexanes, and finally 100% ethylacetate to give 0.120 g of the desired product: mp 190-191° C.; MS (ES)m/z (relative intensity): 455 (M⁺+H, 100).

EXAMPLE 89b6-Methoxy-8-{4-(1,4-trans)[4-(1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-′yl}-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.027 g). mp 208-210° C. MS (ES) m/z (relativeintensity): 455 (M⁺+H, 100).

EXAMPLE 90a8-{4-(1,4-cis)[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-′yl}-6-methyl-quinoline

To a solution of 0.275 g of 6-Methyl, 8-piperazino-quinoline in 10 mL ofCH₂Cl₂, was added 0.326 g of4-(5-fluoro-1-methyl-3-indolyl)-cyclohexanone followed by 0.639 g ofsodium triacetoxyborohydride and 0.2 mL acetic acid. The reaction wasstirred at room temperature overnight. It was quenched with 1N NaOH, andthe product was extracted with CH₂Cl₂. The organic phase was washed withwater and dried over magnesium sulfate. The product was filtered through75 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.145 g of thedesired product: mp 179-181° C.; MS (ES) m/z (relative intensity): 457(M⁺+H, 100).

EXAMPLE 90b8-{4-(1,4-trans)[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-′yl}-6-methyl-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.043 g). mp 98-103° C. MS (ES) m/z (relativeintensity): 457 (M⁺+H, 100).

EXAMPLE 91a8-{(1,4-cis)-4-[4-(5-Cyano-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methyl-quinoline

To a solution of 0.300 g of 6-Methyl, 8-piperazino-quinoline in 10 mL ofCH₂Cl₂, was added 0.280 g of 4-(1-H-3-indolyl)-cyclohexanone followed by0.700 g of sodium triacetoxyborohydride and 0.2 mL acetic acid. Thereaction was stirred at room temperature overnight. It was quenched with1N NaOH, and the product was extracted with CH₂Cl₂. The organic phasewas washed with water and dried over magnesium sulfate. The product wasfiltered through 100 mL of silica gel using 50% ethyl acetate/hexanes,75% ethyl acetate/hexanes, and finally 100% ethyl acetate to give 0.125g of the desired product: mp 132-135° C.; MS (ES) m/z (relativeintensity): 425 (M⁺+H, 100).

EXAMPLE 91b8-{(1,4-cis)-4-[4-(5-Cyano-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methyl-quinoline

To a solution of 0.275 g of 6-Methyl, 8-piperazino-quinoline in 10 mL ofCH₂Cl₂, was added 0.315 g of3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrile followed by 0.639 g ofsodium triacetoxyborohydride and 0.2 mL acetic acid. The reaction wasstirred at room temperature overnight. It was quenched with 1N NaOH, andthe product was extracted with CH₂Cl₂. The organic phase was washed withwater and dried over magnesium sulfate. The product was filtered through100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.175 g of thedesired product: mp 142-147° C.; MS (ES) m/z (relative intensity): 450(M⁺+H, 100).

EXAMPLE 928-{(1,4-cis)-4-[4-(1-Ethyl-5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

To a solution of 0.400 g of 6-Methoxy, 8-piperazino-quinoline in 20 mLof CH₂Cl₂, was added 0.300 g of4-(5-fluoro-1-ethyl-3-indolyl)-cyclohexanone followed by 0.651 g ofsodium triacetoxyborohydride and 0.4 mL acetic acid. The reaction wasstirred at room temperature overnight. It was quenched with 1N NaOH, andthe product was extracted with CH₂Cl₂. The organic phase was washed withwater and dried over magnesium sulfate. The product was filtered through100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.041 g of thedesired product: mp 203-205° C.; MS (ES) m/z (relative intensity): 487(M⁺+H, 100).

EXAMPLE 93a8-{(1,4-cis)-4-[4-(5-Methoxy-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

To a solution of 0.500 g of 6-Methoxy, 8-piperazino-quinoline in 20 mLof CH₂Cl₂, was added 0.565 g of4-(5-methoxy-1-methyl-3-indolyl)-cyclohexanone followed by 1.1 g ofsodium triacetoxyborohydride and 0.4 mL acetic acid. The reaction wasstirred at room temperature overnight. It was quenched with 1N NaOH, andthe product was extracted with CH₂Cl₂. The organic phase was washed withwater and dried over magnesium sulfate. The product was filtered through200 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.077 g of thedesired product: mp 170-172° C.; MS (ES) m/z (relative intensity): 485(M⁺+H, 100).

EXAMPLE 93b8-{(1,4-trans)-4-[4-(5-Methoxy-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.039 g). mp 185-186° C. MS (ES) m/z (relativeintensity): 485 (M⁺+H, 100).

EXAMPLE 94a3-{(1,4-cis)-4-[4-(6-Isopropoxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 0.350 g of 6-Isopropoxy, 8-piperazino-quinoline in 10mL of CH₂Cl₂ was added 0.356 g of3-(4-oxo-cyclohexyl)-1-methyl-1H-indole-5-carbonitrile followed by 0.405g of sodium triacetoxyborohydride and 0.08 mL acetic acid. The reactionwas stirred at room temperature overnight. It was quenched with 1N NaOH,and the product was extracted with CH₂Cl₂. The organic phase was washedwith water and dried over magnesium sulfate. The product was filteredthrough 100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.141 g of thedesired product: mp 223-226° C.; MS (ES) m/z (relative intensity): 508(M⁺+H, 100).

EXAMPLE 94b3-{(1,4-trans)-4-[4-(6-Isopropoxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.087 g). mp 221-223° C. MS (ES) m/z (relativeintensity): 508 (M⁺+H, 100).

EXAMPLE 95a3-{(1,4-cis)-4-[4-(6-Fluoro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 0.300 g of 6-Fluoro, 8-piperazino-quinoline in 10 mL ofCH₂Cl₂, was added 0.411 g of3-(4-oxo-cyclohexyl)-1-methyl-1H-indole-5-carbonitrile followed by 0.359g of sodium triacetoxyborohydride and 0.1 mL acetic acid. The reactionwas stirred at room temperature overnight. It was quenched with 1N NaOH,and the product was extracted with CH₂Cl₂. The organic phase was washedwith water and dried over magnesium sulfate. The product was filteredthrough 100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.187 g of thedesired product: mp 230° C.; MS (ES) m/z (relative intensity): 468(M⁺+H, 100).

EXAMPLE 95b3-{(1,4-trans)-4-[4-(6-Fluoro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.039 g). mp 214-216° C. MS (ES) m/z (relativeintensity): 468 (M⁺+H, 100).

EXAMPLE 96a3-{(1,4-cis)-4-[4-(6-Trifluoromethoxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 0.297 g of 6-Trifluoromethoxy, 8-piperazino-quinolinein 10 mL of DCE was added 0.272 g of3-(4-oxo-cyclohexyl)-1-methyl-1H-indole-5-carbonitrile followed by 0.316g of sodium triacetoxyborohydride and 0.1 mL acetic acid. The reactionwas stirred at room temperature overnight. It was quenched with 1N NaOH,and the product was extracted with CH₂Cl₂. The organic phase was washedwith water and dried over magnesium sulfate. The product was filteredthrough 100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.166 g of thedesired product: mp 206° C.; MS (ES) m/z (relative intensity): 534(M⁺+H, 100).

EXAMPLE 96b3-{(1,4trans)-4-[4-(6-Trifluoromethoxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.064 g). mp 170° C. MS (ES) m/z (relative intensity):534 (M⁺+H, 100).

EXAMPLE 97a3-{(1,4-cis)-4-[4-(5-Methoxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 0.500 g of 5-Methoxy, 8-piperazino-quinoline in 10 mLof DCE, was added 0.544 g of3-(4-oxo-cyclohexyl)-1-methyl-1H-indole-5-carbonitrile followed by 0.633g of sodium triacetoxyborohydride and 0.2 mL acetic acid. The reactionwas stirred at room temperature overnight. It was quenched with 1N NaOH,and the product was extracted with CH₂Cl₂. The organic phase was washedwith water and dried over magnesium sulfate. The product was filteredthrough 100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.310 g of thedesired product: mp 221° C.; MS (ES) m/z (relative intensity): 480(M⁺+H, 100).

EXAMPLE 97b3-{(1,4-trans)-4-[4-(5-Methoxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.118 g). mp 206° C. MS (ES) m/z (relative intensity):480 (M⁺+H, 100).

EXAMPLE 98a8-{(1,4-cis)-4-[4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-Fluoro-quinoline

To a solution of 0.300 g of 6-Fluoro, 8-piperazino-quinoline in 10 mL ofDCE, was added 0.411 g of 4-(5-fluoro-1-methyl-3-indolyl)-cyclohexanonefollowed by 0.349 g of sodium triacetoxyborohydride and 0.1 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 50% ethylacetate/hexanes, 75% ethyl acetate/hexanes, and finally 100% ethylacetate to give 0.190 g of the desired product: mp 194.5° C.; MS (ES)m/z (relative intensity): 461 (M⁺+H, 100).

EXAMPLE 98b8-{(1,4-trans)-4-[4-(5-Fluoro-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-Fluoro-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.062 g). mp 171° C. MS (ES) m/z (relative intensity):461 (M⁺+H, 100).

EXAMPLE 99a3-{(1,4-cis)-4-[4-(6-Benzyloxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 0.300 g of 6-Benzyloxy, 8-piperazino-quinoline in 10 mLof DCE, was added 0.252 g of3-(4-oxo-cyclohexyl)-1-methyl-1H-indole-5-carbonitrile followed by 0.297g of sodium triacetoxyborohydride and 0.1 mL acetic acid. The reactionwas stirred at room temperature overnight. It was quenched with 1N NaOH,and the product was extracted with CH₂Cl₂. The organic phase was washedwith water and dried over magnesium sulfate. The product was filteredthrough 100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.172 g of thedesired product: mp 171° C.; MS (ES) m/z (relative intensity): 556(M⁺+H, 100).

EXAMPLE 99b3-{(1,4-trans)-4-[4-(6-Benzyloxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.083 g). mp 118.5° C. MS (ES) m/z (relativeintensity): 556 (M⁺+H, 100).

EXAMPLE 1003-{(1,4-cis)-4-[4-(6-Hydroxy-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

A solution of 0.100 g of3-{(1,4-cis)-4-[4-(6-Benzyloxy-quinolin-8-yl)piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrilein THF is added to a suspension of 0.015 gr 10% Pd/C in MeOH andhydrogenated for ½ hour. Filtered and the solvent was evaporated to give0.045 g of the desired product. mp 144° C. MS (ES) m/z (relativeintensity): 466 (M⁺+H, 100).

EXAMPLE 1013-{(1,4-cis)-4-[4-(6-Fluoro-8-quinolinyl)-1-piperazinyl]-cyclohexyl}-1-methyl-1H-indole-5-′carboxamide

To a solution of 0.100 g of6-fluoro-8-{4-[4-(5-fluoro-1-methyl-1H-indol-3-yl)cyclohexyl]-1-′piperazinyl}quinolinein 5 ml (THF:MeOH), 1 ml of 5N NaOH was added followed by 2 ml 30%H₂O₂,. The mixture was stirred at ROOM TEMPERATURE for 24 hours. Watewas added and the product was filtered to give 0.035 g of the desiredproduct. mp 289° C. MS (ES) m/z (relative intensity): 486 (M⁺+H, 100).

EXAMPLE 102a3-{(1,4-cis)-4-[4-(5-Trifluoromethyl-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 0.250 g of 5-Trifluoromethyl, 8-piperazino-quinoline in10 mL of DCE, was added 0.224 g of3-(4-oxo-cyclohexyl)-1-methyl-1H-indole-5-carbonitrile followed by 0.287g of sodium triacetoxyborohydride and 0.2 mL acetic acid. The reactionwas stirred at room temperature overnight. It was quenched with 1N NaOH,and the product was extracted with CH₂Cl₂. The organic phase was washedwith water and dried over magnesium sulfate. The product was filteredthrough 100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.057 g of thedesired product: mp 231° C.; MS (ES) m/z (relative intensity): 518(M⁺+H, 100).

EXAMPLE 102b3-{(1,4-trans)-4-[4-(5-Trifluoromethyl-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.044 g). mp 194-197° C. MS (ES) m/z (relativeintensity): 518 (M⁺+H, 100).

EXAMPLE 103a3-{(1,4-cis)-4-[4-(6-Chloro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 0.300 g of 6-Chloro, 8-piperazino-quinoline in 10 mL ofDCE, was added 0.305 g of3-(4-oxo-cyclohexyl)-1-methyl-1H-indole-5-carbonitrile followed by 0.274g of sodium triacetoxyborohydride and 0.2 mL acetic acid. The reactionwas stirred at room temperature overnight. It was quenched with 1N NaOH,and the product was extracted with CH₂Cl₂. The organic phase was washedwith water and dried over magnesium sulfate. The product was filteredthrough 100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.057 g of thedesired product: mp 222° C.; MS (ES) m/z (relative intensity): 485(M⁺+H, 100).

EXAMPLE 103b3-{(1,4-trans)-4-[4-(6-Chloro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.044 g). mp 229° C. MS (ES) m/z (relative intensity):485 (M⁺+H, 100).

EXAMPLE 104a8-{(1,4-cis)-4-[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-chloro-quinoline

To a solution of 0.247 g of 6-Chloro, 8-piperazino-quinoline in 10 mL ofDCE, was added 0.245 g of 4-(5-fluoro-1-methyl-3-indolyl)-cyclohexanonefollowed by 0.274 g of sodium triacetoxyborohydride and 0.2 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 50% ethylacetate/hexanes, 75% ethyl acetate/hexanes, and finally 100% ethylacetate to give 0.070 g of the desired product: mp 219° C.; MS (ES) m/z(relative intensity): 478 (M⁺+H, 100).

EXAMPLE 104b8-{(1,4-trans)-4-[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-chloro-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.049 g). mp 193° C. MS (ES) m/z (relative intensity):478 (M⁺+H, 100).

EXAMPLE 105a3-{(1,4-cis)-4-[4-(5-Chloro-8-quinolinyl)-1-piperazinyl]-cyclohexyl}-1-methyl-1H-indole-5-′carbonitrile

To a solution of 0.250 g of 5-Chloro, 8-piperazino-quinoline in 10 mL ofDCE, was added 0.260 g of3-(4-oxo-cyclohexyl)-1-methyl-1H-indole-5-carbonitrile followed by 0.274g of sodium triacetoxyborohydride and 0.2 mL acetic acid. The reactionwas stirred at room temperature overnight. It was quenched with 1N NaOH,and the product was extracted with CH₂Cl₂. The organic phase was washedwith water and dried over magnesium sulfate. The product was filteredthrough 100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.080 g of thedesired product: mp 243-248° C.; MS (ES) m/z (relative intensity): 485(M⁺+H, 100).

EXAMPLE 105b3-{(1,4-trans)-4-[4-(5-Chloro-8-quinolinyl)-1-piperazinyl]-cyclohexyl}-1-methyl-1H-indole-5-′carbonitrile

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.034 g). mp 192-196° C. MS (ES) ml/z (relativeintensity): 485 (M⁺+H, 100).

EXAMPLE 106a8-{(1,4-cis)-4-[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-5-chloro-quinoline

To a solution of 0.250 g of 5-Chloro, 8-piperazino-quinoline in 10 mL ofDCE, was added 0.224 g of 4-(5-fluoro-1-methyl-3-indolyl)-cyclohexanonefollowed by 0.274 g of sodium triacetoxyborohydride and 0.1 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 50% ethylacetate/hexanes, 75% ethyl acetate/hexanes, and finally 100% ethylacetate to give 0.053 g of the desired product: mp 196° C.; MS (ES) m/z(relative intensity): 478 (M⁺+H, 100).

EXAMPLE 106b8-{(1,4-trans)-4-[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-5-chloro-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.025 g). mp 196° C. MS (ES) m/z (relative intensity):478 (M⁺+H, 100).

EXAMPLE 107a8-{(1,4-cis)-4-[4-(6-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-5-chloro-quinoline

To a solution of 0.250 g of 5-Chloro, 8-piperazino-quinoline in 10 mL ofDCE, was added 0.250 g of 4-(6-fluoro-1-methyl-3-indolyl)-cyclohexanonefollowed by 0.274 g of sodium triacetoxyborohydride and 0.2 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 50% ethylacetate/hexanes, 75% ethyl acetate/hexanes, and finally 100% ethylacetate to give 0.030 g of the desired product: mp 107-110° C.; MS (ES)m/z (relative intensity): 478 (M⁺+H, 100).

EXAMPLE 107b8-{(1,4-trans)-4-[4-(6-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-5-chloro-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.014 g). mp 228° C. MS (ES) m/z (relative intensity):478 (M⁺+H, 100).

EXAMPLE 108a8-{(1,4-cis)-4-[4-(5-Benzyloxy-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

To a solution of 0.650 g of 6-Methoxy, 8-piperazino-quinoline in 15 mLof DCE, was added 0.959 g of4-(5-benzyloxy-1-methyl-3-indolyl)-cyclohexanone followed by 0.790 g ofsodium triacetoxyborohydride and 0.5 mL acetic acid. The reaction wasstirred at room temperature overnight. It was quenched with 1N NaOH, andthe product was extracted with CH₂Cl₂. The organic phase was washed withwater and dried over magnesium sulfate. The product was filtered through100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.175 g of thedesired product: mp 168° C.; MS (ES) m/z (relative intensity): 561(M⁺+H, 100).

EXAMPLE 108b8-{(1,4-trans)-4-[4-(5-Benzyloxy-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.055 g). mp 228° C. MS (ES) m/z (relative intensity):561 (M⁺+H, 100).

EXAMPLE 109a8-{(1,4-cis)-4-[4-(6-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-5-fluoro-quinoline

To a solution of 0.231 g of 5-Fluoro, 8-piperazino-quinoline in 10 mL ofDCE, was added 0.245 g of 4-(6-fluoro-1-methyl-3-indolyl)-cyclohexanonefollowed by 0.274 g of sodium triacetoxyborohydride and 0.1 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 50% ethylacetate/hexanes, 75% ethyl acetate/hexanes, and finally 100% ethylacetate to give 0.030 g of the desired product: mp 112-115° C.; MS (ES)m/z (relative intensity): 461 (M⁺+H, 100).

EXAMPLE 109b8-{(1,4-trans)-4-[4-(6-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-5-fluoro-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.010 g). MS (ES) m/z (relative intensity): 461 (M⁺+H,100).

EXAMPLE 1103-{(1,4-cis)-4-[4-(6-Methoxy-8-quinolinyl)-1-piperazinyl]-cyclohexyl}-1-methyl-1H-indol-5-ol

A solution of 0.120 g of8-{(1,4-cis)-4-[4-(5-benzyloxy-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-6-methoxy-quinolinein 10 ml THF is added to a suspension of 0.100 g 10% Pd/C in MeOH andhydrogenated for 1 hour. Filtered and the solvent was evaporated to give0.036 g of the desired product. mp 250° C. MS (ES) m/z (relativeintensity): 471 (M⁺+H, 100).

EXAMPLE 111a8-{(1,4-cis)-4-[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-5-fluoro-quinoline

To a solution of 0.200 g of 5-Fluoro, 8-piperazino-quinoline in 10 mL ofDCE, was added 0.245 g of 4-(5-fluoro-1-methyl-3-indolyl)-cyclohexanonefollowed by 0.274 g of sodium triacetoxyborohydride and 0.1 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 50% ethylacetate/hexanes, 75% ethyl acetate/hexanes, and finally 100% ethylacetate to give 0.040 g of the desired product: mp 199-202° C.; MS (ES)m/z (relative intensity): 461 (M⁺+H, 100).

EXAMPLE 111b8-{(1,4-trans)-4-[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-piperazin-1-yl}-5-fluoro-quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.021 g). mp 197° C.; MS (ES) m/z (relative intensity):461 (M⁺+H, 100).

EXAMPLE 112a8-Chloro-7-{(1,4-cis)-4-[4-(5-Fluoro-1-methyl-1H-indol-3-yl)-cyclohexyl]-1-′piperazinyl}quinoline

To a solution of 0.247 g of 8-Chloro, 7-piperazino-quinoline in 10 mL ofDCE, was added 0.245 g of 4-(5-fluoro-1-methyl-3-indolyl)-cyclohexanonefollowed by 0.274 g of sodium triacetoxyborohydride and 0.2 mL aceticacid. The reaction was stirred at room temperature overnight. It wasquenched with 1N NaOH, and the product was extracted with CH₂Cl₂. Theorganic phase was washed with water and dried over magnesium sulfate.The product was filtered through 100 mL of silica gel using 50% ethylacetate/hexanes, 75% ethyl acetate/hexanes, and finally 100% ethylacetate to give 0.085 g of the desired product: mp 182-184° C.; MS (ES)m/z (relative intensity): 478 (M⁺+H, 100).

EXAMPLE 112b8-Chloro-7-{(1,4-trans)-4-[4-(5-fluoro-1-methyl-1H-indol-3-yl)cyclohexyl]-1-piperazinyl}quinoline

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.025 g). mp 181-182° C.; MS (ES) m/z (relativeintensity): 478 (M⁺+H, 100).

EXAMPLE 113a3-{(1,4-cis)4-[4-(8-Chloro-7-quinolinyl)-1-piperazinyl]-cyclohexyl}-1-methyl-1H-indole-5-carbonitrile

To a solution of 0.247 g of 8-Chloro, 7-piperazino-quinoline in 10 mL ofDCE, was added 0.252 g of4-(5-fluoro-1-methyl-1-H-3-indolyl)-cyclohexanone followed by 0.274 g ofsodium triacetoxyborohydride and 0.2 mL acetic acid. The reaction wasstirred at room temperature overnight. It was quenched with 1N NaOH, andthe product was extracted with CH₂Cl₂. The organic phase was washed withwater and dried over magnesium sulfate. The product was filtered through100 mL of silica gel using 50% ethyl acetate/hexanes, 75% ethylacetate/hexanes, and finally 100% ethyl acetate to give 0.075 g of thedesired product: mp 240-242° C.; MS (ES) m/z (relative intensity): 485(M⁺+H, 100).

EXAMPLE 113b3-{(1,4-trans)-4-[4-(8-Chloro-7-quinolinyl)-1-piperazinyl]-cyclohexyl}-1-methyl-1H-indole-5-′carbonitrile

The trans isomer was isolated at the same time as the cis isomer as anoff white solid (0.015 g). mp 233-237° C.; MS (ES) m/z (relativeintensity): 485 (M⁺+H, 100).

EXAMPLE 114a3-{(1,4-cis)-4-[4-(4-Fluoro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

To a solution of 0.310 g (1.34 mmol) of 4-fluoro-8-piperazino-quinolinein 50 mL of CH₂Cl₂, was added 0.319 g (1.34 mmol) of3-(4-oxo-cyclohexyl)-1H-indole-5-carbonitrile followed by 0.402 g (1.5eq) of sodium triacetoxyborohydride and 0.076 mL acetic acid. Thereaction was stirred at room temperature overnight. It was quenched with1 N NaOH, and the product was extracted with ether. The organic phasewas washed with water and dried. The product was filtered through 75 mLof silica gel using 25% ethyl acetate/hexanes, 75% ethylacetate/hexanes, to give 0.185 g of the cis product: mp 152-160° C.; MS(ES) m/z (relative intensity): 454.3 (M⁺+H, 100).

EXAMPLE 114b3-{(1,4-trans)-4-[4-(4-Fluoro-quinolin-8-yl)-piperazin-1-yl]-cyclohexyl}-1H-indole-5-carbonitrile

The trans isomer (0.065 g) was isolated at the same time as the ciscompound, as an off-white solid: mp 144-152° C. MS (ES) m/z (relativeintensity): 454.4 (M⁺+H, 100).

The activity of the present compounds is demonstrated by the followingstandard pharmacological test procedures.

The PCR cloning of the human 5-HT_(1A) receptor subtype from a humangenomic library has been described previously Chanda et al., Mol.Pharmacol., 43:516 (1993). A stable Chinese hamster ovary cell lineexpressing the human 5-HT_(1A) receptor subtype (5-HT_(1A).CH₂O cells)was employed throughout this study. Cells were maintained in DMEMsupplemented with 10% fetal calf serum, non-essential amino acids andpenicillin/streptomycin.

Cells were grown to 95-100% confluency as a monolayer before membraneswere harvested for binding studies. Cells were gently scraped from theculture plates, transferred to centrifuge tubes, and washed twice bycentrifugation (2000 rpm for 10 min., 4° C.) in buffer (50 mM Tris; pH7.5). The resulting pellets were aliquoted and placed at −80° C. On theday of assay, the cells were thawed on ice, and resuspended in buffer.Studies were conducted using [³H]8-OH-DPAT as the radioligand. Thebinding assay was performed in 96 well microtiter plates in a finaltotal volume of 250 μL of buffer. Competition experiments were performedby using 7 concentrations of unlabelled drug and a final ligandconcentration of 1.5 nM. Non-specific binding was determined in thepresence of 10 μM 5HT. Saturation analysis was conducted by using[³H]8-OH-DPAT at concentaritions ranging from 0.3-30 nm Following a 30minute incubation at room temperature, the reaction was terminated bythe addition of ice cold buffer and rapid filtration using a M-96Brandel Cell Harvester (Gaithersburg, Md.) through a GF/B filterpresoaked for 30 minutes in 0.5% polyethylenenimine.

A protocol similar to that used by Cheetham et al., Neuropharmacol.32:737 (1993) was used to determine the affinity of compounds for theserotonin transporter. Briefly, frontal cortical membranes prepared frommale Sprague-Dawley rats were incubated with ³H-paroxetine (0.1 nM) for60 minutes at 25° C. All tubes also contained either vehicle, testcompound (one to eight concentrations), or a saturating concentration offluoxetine (10 μM) to define specific binding. All reactions areterminated by the addition of ice cold Tris buffer followed by rapidfiltration using a Tom Tech filtration device to separate bound fromfree ³H-paroxetine. Bound radioactivity was quantitated using a Walla1205 Beta plate® Counter. Nonlinear regression analysis was used todetermine IC₅₀ values which were converted to Ki values using the methodof Cheng and Prusoff, Biochem. Pharmacol., 22:3099 (1973);Ki=IC50/((Radioligand conc.)/(1+KD)).

The [³⁵S]-GTPγS biding assay was similar to that used by Lazarenno andBirdsall, Br. J. Pharmacol. 109:1120 (1993). Briefly, 5-HT1A clonedreceptor membrane fragments (as used for 5-HT1A receptor binding assayswere stored at −70° C. unit needed. When needed, membranes were rapidlythawed, centrifuged at 40,00×g for 10 minutes and resuspended at 4° C.for 10 minutes in assay buffer (25 mM HEPES, 3 mM MgCl₂, 100 mM NaCl, 1mM EDTA, 10 uM GDP, 500 mM DTT, pH 8.0). These membranes were thenincubated for 30 minutes at 30+ C. with [³⁵S]GTPgS (1 nM) in thepresence of vehicle, test compound (one to eight concentrations), orexcess 8-OH-DPAT to define maximum agonist response. All reactions areterminated by the addition of ice cold Tris buffer followed by rapidfiltration using a Tom Tech® filtration device to separate bound fromfree [³⁵S]GTPgS. Agonists produce an increase in the amount of[³⁵S]GTPgS bound whereas antagonists produce no increase in binding.Bound radioactivity was counted and analyzed as above.

The following assays were performed by incubating the cells with DMEMcontaining 25 mM HEPES, 5 mM theophylline and 10 μM pargyline for aperiod of 20 minutes at 37° C. Functional activity was assessed bytreating the cells with forskolin (1 uM final concentration) followedimmediately by test compound (6 concentrations) for an additional 10minutes at 37° C. In separate experiments, 6 concentrations ofantagonist were preincubated for 20 minutes prior to the addition of 10nM 8-OH-DPAT and forskolin. The reaction was terminated by removal ofthe media and addition of 0.5 ml ice cold assay buffer. Plates werestored at −20° C. prior to assessment of cAMP formation by a cAMP SPAassay (Amersham).

The compounds tested correspond to those prepared in Examples 1-13above. The results of the procedures are set forth in Table 1.

Exam- ple 5-HT_(1A) ST GTPγS ED50 cAMP ED50 No. (Ki, nM) (K_(i), nM,) (%EMax) (EMax)  1a  32.0  38.0 327 (0%) 631 (0%)  1b  5.29 155 176 (32%)17 (77%)  2a 117.3  27%  2b  22.3  0%  3a  36.7  5.4 650 (10%) 400 (0%) 3b  4.62  10.07 42.6 (51%) 155 (0%)  4a  33.5  12.7 278 (0%) 580 (0%) 4b  5.45  35% 85 (7.5%)  5a  0%  34%  5b  78.7%  14%  6a 325.7  28 84.6(53%) 4.72 (80%)  6b  58.3  20%  7a  69.6  1.62 539 (0%) 87 (0%)  7b 3.51  4.19 8.9 (83%)  8a  60.3  25% 0% 357 (0%)  8b  2.87  0% 38.6(32%) 8.9 (77%)  9a  87.1  4%  9b  13.0  12% 10a  15.81  18% 0% 209 (0%)10b  7.78  0% 16.3 (14%) 3.9 (79%) 11  0%  40 12a 234  0.76 12b  53.2 35% 13a 563.5  8.9 13b 827  40 14a 819.9  17 14b  0%  40 15a 694.2  2815b  0%  16% 16a  0%  29.0 16b  0% @  25% 100 nM 100 nM 17  0%  2.5 18129.4  1.36 19a 264.4  5.72 19b  26.2  24% 418 (74%) 14.9 (92%) 20a631.2  29% 20b  14.9  0% 35.5 (33%) 3.05 (75.5%) 21 110.4  11% 22a  80.7 4.96 0% 101.3 (0%) 22b  11.6  36.5 4.5% 357 (0%) 23a 103.2  22% 23b 14.9  32% 24a  65.7  6.90 15.4% 52.1 (81%) 24b  11.3  36.0 73% 25a 67.7  63.0 9% 16.0 (0%) 25b  9.66  58.0 24 (46%) 26a  59.1  4.1 3960(18%) 59.6 (0%) 26b  8.5  23.0 15 (39%) 27a  69.7  8.6 139 (20%) 212(0%) 27b  6.54  28.0 26 (66%) 28  25.1  2.02 25 (0%) 95 (0%) 29a  43.9 2.25 23% 9.05 (0%) 29b  2.91  46.0% 34 (70%) 30  24.5  1.25 29.5 (95%)31a 142.2  13 31b  32.4  17% 32a 245.6  14 32b  49.1  22% 33a  98.9  1.933b  19.2  45.0 33c 431.0  7.1 34a 185.4  1.49 34b  8.37  17.0 35  70.1 91 36  12.34  28 84.6 (53%) 4.72 (80%) 38 124  7.22 44c  21.0  1.5 556(0%) 521 (0%)

As demonstrated by the results set forth above, the compounds of thepresent invention are active towards 5HT1A receptors and generallyelevate serotonin levels by inhibiting 5-HT transport. Accordingly, thepresent compounds should be useful in treating disorders related todefects in serotonin concentration.

The compounds of this invention may be administered orally orparenterally, neat or in combination with conventional pharmaceuticalcarriers. Applicable solid carriers can include one or more substanceswhich may also act as flavoring agents, lubricants, solubilizers,suspending agents, fillers, glidants, compression aids, binders ortablet-disintegrating agents or an encapsulating material. In powders,the carrier is a finely divided solid which is in admixture with thefinely divided active ingredient. In tablets, the active ingredient ismixed with a carrier having the necessary compression properties insuitable proportions and compacted in the shape and size desired. Thepowders and tablets preferably contain up to 99% of the activeingredient. Any of the solid carriers known to those skilled in the artmay be used with the compounds of this invention. Particularly suitablesolid carriers include, for example, calcium phosphate, magnesiumstearate, talc, sugars, lactose, dextrin, starch, gelatin, cellulose,methyl cellulose, sodium carboxymethyl cellulose, polyvinylpyrrolidone,low melting waxes and ion exchange resins.

Liquid carriers may be used in preparing solutions, suspensions,emulsions, syrups and elixirs of the compounds of this invention. Thecompounds of this invention can be dissolved or suspended in apharmaceutically acceptable liquid carrier such as water, an organicsolvent, a mixture of both or pharmaceutically acceptable oils or fat.The liquid carrier can contain other suitable pharmaceutical additivessuch as solubilizers, emulsifiers, buffers, preservatives, sweeteners,flavoring agents, suspending agents, thickening agents, colors,viscosity regulators, stabilizers or osmo-regulators. Suitable examplesof liquid carriers for oral and parenteral administration include water(particularly containing additives as above, e.g., cellulosederivatives, preferably sodium carboxymethyl cellulose solution),alcohols (including monohydric alcohols and polyhydric alcohols, e.g.,glycols) and their derivatives and oils (e.g., fractionated coconut oiland arachis oil). For parenteral administration, the carrier can also bean oily ester such as ethyl oleate and isopropyl myristate. Sterileliquid carriers are used in sterile liquid form compositions forparenteral administration.

Liquid pharmaceutical compositions which are sterile solutions orsuspensions can be utilized by, for example, intramuscular,intraperitoneal or subcutaneous injection. Sterile solutions can also beadministered intravenously. Compositions for oral administration may beeither liquid or solid composition form.

Preferably, the pharmaceutical compositions containing the compounds ofthis invention are in unit dosage form, e.g., tablets or capsules. Insuch form, the compositions may be sub-divided in unit doses containingappropriate quantities of the present compounds. The unit dosage formscan be packaged compositions, for example, packeted powders, vials,ampoules, prefilled syringes or sachets containing liquids.Alternatively, the unit dosage form can be, for example, a capsule ortablet itself, or it can be the appropriate number of any suchcompositions in package form.

The therapeutically effective amount of the compounds of this inventionthat is administered and the dosage regimen depends on a variety offactors, including the weight, age, sex, and medical condition of thesubject, the severity of the disease, the route and frequency ofadministration, and the specific compound employed, and thus may varywidely. However, it is believed that the pharmaceutical compositions maycontain the compounds of this invention in the range of about 0.1 toabout 2000 mg, preferably in the range of about 0.5 to about 500 mg andmore preferably between about 1 and about 100 mg. Projected dailydosages of active compound are about 0.01 to about 100 mg/kg bodyweight. The daily dose can be conveniently administered two to fourtimes per day.

The present invention may be embodied in other specific forms withoutdeparting from the spirit and essential attributes thereof andaccordingly, reference should be made to the appended claims, ratherthan to the foregoing specification, as indicating the scope of theinvention.

What is claimed is:
 1. A compound of the formula:

wherein: R₁, R₂ and R₃ are each, independently, hydrogen, halogen, CF₃,alkyl, alkoxy, MeSO₂, or any two of R₁, R₂ and R₃ taken together withthe ortho and meta carbon atoms of the ring to which they are attachedcan form a 5-7 membered carbocyclic or heterocyclic ring which includesup to two non-carbon ring atoms each of which independently is either Nor O; R₄ is hydrogen, halogen, or alkyl; R₅ is hydrogen, alkyl,alkylaryl, or aryl; R₆ is hydrogen, halogen, CF₃, CN, carbamido, oralkoxy; X₁, X₂ and X₃ are each carbon or one of X₁, X₂ or X₃ may benitrogen; Y is carbon; and Z is carbon or nitrogen; or pharmaceuticallyacceptable salts thereof.
 2. A compound as in claim 1, wherein: R₁, R₂and R₃ are each, independently, hydrogen, halogen, alkyl, alkoxy, or anytwo of R₁, R₂ and R₃ taken together can form a 57 membered carbocyclicor heterocyclic ring which includes up to two non-carbon ring atoms eachof which independently is either N or O; R₄ is hydrogen or halogen; R₅is hydrogen, alkyl or alkylaryl; R₆ is hydrogen, halogen, CN or alkoxy;and X₁, X₂, X₃, and Z are each carbon; or pharmaceutically acceptablesalts thereof.
 3. A compound of claim 1 which is5-Fluoro-3-{(1,4-cis)-4-[4-(2-methoxy-phenyl)-piperidin-1-yl]-cyclohexyl}-1H-indole.4. A compound of claim 1 which is5-Fluoro-3-{(1,4-trans)-4-[4-(2-methoxy-phenyl)-piperidin-1-yl]-cyclohexyl}-1H-indole.5. A pharmaceutical composition comprising a compound of the formula:

wherein: R₁, R₂ and R₃ are each, independently, hydrogen, halogen, CF₃,alkyl, alkoxy, MeSO₂, or any two of R₁, R₂ and R₃ taken together withthe ortho and meta carbon atoms of the ring to which they are attachedcan form a 5-7 membered carbocyclic or heterocyclic ring which includesup to two non-carbon ring atoms each of which independently is either Nor O; R₄ is hydrogen, halogen, or alkyl; R₅ is hydrogen, alkyl,alkylaryl, or aryl; R₆ is hydrogen, halogen, CF₃, CN, carbamido, oralkoxy; X₁, X₂ and X₃ are each carbon or one of X₁, X₂ or X₃ may benitrogen; Y is carbon; and Z is carbon or nitrogen; or pharmaceuticallyacceptable salts thereof.
 6. A method for treating depression in apatient in need thereof comprising administering to said patient anantidepressant effective amount of a compound of the formula:

wherein: R₁, R₂ and R₃ are each, independently, hydrogen, halogen, CF₃,alky, alkoxy, MeSO₂, or any two of R₁, R₂ and R₃ taken together with theortho and meta carbon atoms of the ring to which they are attached canform a 5-7 membered carbocyclic or heterocyclic ring which includes upto two non-carbon ring atoms each of which independently is either N orO; R₄ is hydrogen, halogen, or alkyl; R₅ is hydrogen, alkyl, alkylaryl,or aryl; R₆ is hydrogen, halogen, CF₃, CN, carbamido, or alkoxy; X₁, X₂and X₃ are each carbon or one of X₁, X₂ or X₃ may be nitrogen; Y iscarbon; and Z is carbon or nitrogen; or pharmaceutically acceptablesalts thereof.